October 2016
Sunday Monday Tuesday Wednesday Thursday Friday Saturday

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3

1. 2 pm, CFN, Bldg. 735 - Seminar Room, 2nd floor

Hosted by: 'Percy Zahl'

Despite the evolution of scanning probe microscopy (SPM) into a powerful set of techniques that image surfaces and map their properties down to the atomic level, significant limitations in both imaging and mapping persist. Currently, typical SPM capabilities qualitatively record only one property at a time and at a fixed distance from the surface. Furthermore, the probing tip's apex is chemically and electronically undefined, complicating data interpretation. To overcome these limitations, we have started to integrate significant extensions to existing SPM approaches. First, we expanded noncontact atomic force microscopy with atomic resolution to three dimensions by adding the capability to quantify the tip-sample force fields near a surface with picometer and piconewton resolution [1, 2]. Next, we gained electronic information by recording the tunneling current simultaneously with the force interaction [3] and introduced a new operating scheme called tuned-oscillator atomic force microscopy that substantially improved imaging robustness and therefore sample throughput and user friendliness [4]. Finally, we will illustrate how the tip chemistry, tip asymmetry, and tip-sample distance influence the recorded interactions – and thus the information one can gain from images –, ultimately allowing to selectively image specific atomic species [3, 5]. During the talk, applications to various model systems including oxides, metals, ionic crystals, and layered materials will be presented. [1] B. J. Albers et al., Nature Nanotechnology 4, 307 (2009). [2] M. Z. Baykara et al., Advanced Materials 22, 2838 (2010). [3] M. Z. Baykara et al., Physical Review B 87, 155414 (2013). [4] O. E. Dagdeviren et al, Nanotechnology 27, 065703 (2016). [4] H. Mönig et al., ACS Nano 7, 10233 (2013). Host: Percy Zahl

4

1. 9 am, Large Seminar Room, Bldg. 510

Hosted by: 'Ketevi A. Assamagan, Mary Bishai and Hooman Davoudiasl'

Dates: October 4-7, 2016. Time: 9:00-18:00 on October 4-6, 2016 and 9:00-12:30 on October 7. Place: Physics Department Large Seminar Room. As part of this workshop, on Tuesday October 4th at 3:30pm: BSA lecture on Dark Interactions in Berknar Hall. Wednesday October 5 at 18:30. Workshop Dinner. Please contact Linda at feierabe@bnl.gov to register for the dinner. For more details about this workshop, see the workshop website:

2. 11 am, Small Seminar Room, Bldg. 510

Hosted by: 'Oleg Eyser'

Ever since fast hydrodynamization has been observed in heavy ion collisions the understanding of the very early non-equilbrium stage of such collisions has been a topic of intense research. We use the gauge/string duality to model the creation of a strongly coupled Quark-Gluon plasma in a non-conformal gauge theory. This study is the first non-conformal holographic simulation of a heavy ion collision. We extract new physics as compared to the conformal case such as the non-trivial equation of state and the presence of a sizeable bulk viscosity. Non-conformality gives rise to an increase of the relaxation times of the resulting plasma. Furthermore, if the bulk viscosity is large enough then the plasma becomes well described by hydrodynamics before the equilibrium equation of state becomes applicable. This time we refer to as the EoSization time. This EoSization process is a new non-conformal relaxation channel involving the evolution of energy density and average pressure. It is exciting to see this new channel for bulk viscsosity values well below QCD critical temperature estimates.

3. 12 pm, Bldg 438 starting place

(Rain date Oct 10) New this year! A friendly inter DOE Lab competition for the 1st mile. Timed Event. DOE sites with the highest proportion of participants and shortest times will win. Pre-registration is required at the web link. Meet at Bldg 438 walk along Brookhaven Ave to the Weather Station and back. Contact healthfest@bnl.gov if any questions.

4. 4 pm, Berkner Hall Auditorium

Hosted by: '''Peter Wanderer'''

Where do we come from? Science is making progress on this age-old question of humankind. The Universe was once much smaller than the size of an atom. Small things mattered in the small Universe, where quantum physics dominated the scene. To understand the way the Universe is today, we have to solve remaining major puzzles. The Higgs boson that was discovered recently is holding our body together from evaporating in a nanosecond. But we still do not know what exactly it is. The mysterious dark matter is holding the galaxy together, and we would not have been born without it. But nobody has seen it directly. And what is the very beginning of the Universe?

5. 5 pm, Recreation Hall, Bldg. 317

Preliminary Rounds - Bldg 317 (downstairs main room) To register, please email Mike McGuigan at mcguigan@bnl.gov

5

1. 11 am, Berkner Lobby & Room D

Pre-registration recommended for the 10 min massages at: http://intranet.bnl.gov/healthfest (11am-2pm) There will be: Ergonomic display, OMC display on Zika, FLU etc, Radiology Imaging, Audiologist, Organ Donor information, Intro to Weight Watchers, LI Blood Services. Room D: Health Screening-Biometrics, cholesterol and Blood sugar by AETNA (11am-1pm)

2. 1:30 pm, Bldg. 734, ISB Conference Room 201 (upstairs)

Hosted by: 'Gabi Kotliar'

In my talk I will present the numerical renormalization group (NRG) as a viable multi-band impurity solver for dynamical mean-field theory (DMFT). NRG offers unprecedented real-frequency spectral resolution at arbitrarily low energies and temperatures. It is thus perfectly suited to study "Hund metals" [1], which show - in experiments and theoretical DMFT calculations - puzzling behavior at unusually low energy scales, like Fermi-liquid behavior at low temperatures, a coherence-incoherence crossover with increasing temperature [2, 3] and fractional power laws for the imaginary part of the Matsubara self-energy in the incoherent regime, discovered already early on with continuous time quantum Monte Carlo (CTQMC) as DMFT solver [3]. I will explicitly demonstrate the advantages of NRG+DMFT in the context of a channel-symmetric three-band Anderson-Hund model on a Bethe lattice at 1/3 filling (with NRG exploiting the non-abelian SU(3) channel symmetry to reduce numerical costs) [4]. In contrast to CTQMC, our NRG+DMFT calculations finally settled the existence of a Fermi-liquid ground state. We further revealed new important insights: our real-frequency one-particle spectral function shows a coherence-incoherence crossover (driven by Hund J rather than Hubbard U) and strong particle-hole asymmetry, which leads to the above-mentioned apparent fractional power laws; two-stage screening, where spin screening occurs at much lower energies than orbital screening ("spin-orbital separation"); and zero-temperature spectral properties that are similar with or without DMFT self-consistency, in contrast to Mott-Hubbard systems, where the DMFT self-consistency opens a gap. A recent reformulation of NRG, called "interleaved NRG" (iNRG) [5, 6] allows to tackle more realistic models of Hund metals where channel symmetries are generally broken (for example, due to crystal field splitting).

3. 4:30 pm, Recreation Hall, Bldg. 317

Hosted by: 'T. Sampieri'

6

1. 9 am, Small Seminar Room, Bldg. 510

Hosted by: 'Michael Begel'

2. 11 am, Bldg 735, Conference Room A

Hosted by: ''Eric Stach''

Metal-semiconductor hybrid nanoparticles (NPs) have synergistic properties that have been exploited in photocatalysis, electrical, and optoelectronic applications. Rational design of hybrid NPs requires the knowledge of the underlying mechanisms of diffusion of the metal species through the nanoscale semiconductor lattice. One extensively studied process of diffusion of two materials across the nanoparticle surface is known as the nanoscale Kirkendall effect. There, an atomic species A with the lower diffusion rate enters the nanocrystal slower than the B species diffusing from the nanocrystal outward. As a result, voids are formed in B, providing an interesting avenue for making hollow nanocrystals. We used time-resolved X-ray absorption fine-structure spectroscopy, X-ray diffraction and electron microscopy to monitor the diffusion process of Au atoms through InAs nanocrystals in real time. In this system the diffusion rate of the inward diffusing species (Au) is faster than that of the outward diffusion species (InAs), which results in the formation of a crystalline metallic Au core surrounded by an amorphous, oxidized InAs shell with voids in it. These observations indicate that in hybrid Au-InAs NPs the rarely observed "reversed nanoscale Kirkendall effect" is in play. It presents a potentially new way to synthesize unique nanoscale core-shell structures.

3. 12:30 pm, Building 510, Room 2-160

Hosted by: ''Hiroshi Oki''

We consider the effective action of the Polyakov loop at finite temperature and density. Using simple models, we show two novel manifestations of the sign problem in QCD: the non-hermitian transfer matrix and the complex saddle point. As a result the mass matrix associated with the Polyakov loop becomes complex, and it gives rise to damped oscillatory behavior in Polyakov loop correlation functions, which reflects oscillatory behavior in the quark-number density reminiscent of density-density correlation functions in liquids. The complex spectrum should be observable in lattice simulations of QCD and may provide a test for finite-density algorithms.

4. 4 pm, Bldg 735, Seminar Room, 2nd Floor

Hosted by: '''Mircea Cotlet'''

7

1. 11 am, ISB Bldg. 734, Conf. Rm. 201 (upstairs)

Hosted by: ''Ian Robinson''

Bragg coherent diffractive imaging is an emerging x-ray imaging technique capable of resolving both defect and ultrafast dynamics in nanocrystals with three-dimensional detail and nanometer resolution. This ability to study single nanocrystals in their reactive environments opens new insight into a broad range of materials science questions, including how to improve materials that convert heat into electricity, understanding degradation in advanced battery cathodes, and probing the structure-stability relationship in fuel cell catalysts. Here I will discuss Bragg CDI studies of phonon dynamics in Zinc Oxide and defect dynamics in thin film grains driven by temperature. Finally, I will touch on future directions for BCDI with the anticipated increase in coherent flux at upgraded synchrotrons.

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1. 11 am, Small Seminar Room, Bldg. 510

Hosted by: 'Oleg Eyser'

Spontaneous Lambda polarization has been observed in unpolarized pp collisions years ago while the precise mechanism behind it remains unknown. It is assumed that the so called polarizing Fragmentation Function(FF) plays a important role in this effect. The polarizing FF is of great interest not only because it is strongly connected to the spin structure of hadrons, but also it is chiral-even and the sign is possible to be unambiguously measured so it provides a unique opportunity to test the universality of the FFs. The large e+e- annihilation data sample collected by the Belle experiment at the KEKB storage ring allows a precision study of the production of transversely polarized hyperons and check our current understanding of the associated QCD dynamics. The measurement of transverse Lambda/anti-Lambda polarization in e+e- annihilation in the inclusive Lambda production processes at Belle will be presented and discussed. The Belle II detector and SuperKEKB, the upgrade of Belle detector and KEKB collider, are being constructed at the KEK laboratory in Tsukuba, Japan. The K-Long and muon system of Belle II, which provides the K-Long and muon identification, consists of an alternating sandwich iron plates and active detector elements located outside of the superconducting solenoid. The Belle KLM based on glass-electrode resistive plate chambers(RPC) has demonstrated good performance. However, the long dead time of the RPCs during the recovery of the electric field after a discharge significantly reduces the detection efficiency under high backgrounds fluxes. So the endcap RPCs and two inner layers of barrel RPCs will be retired and replaced with scintillators in Belle II. This talk will introduce the Belle-II detector, mainly KLM system and the related offline software, KLM alignment and the current status of cosmic ray test (CRT).

12

1. 12 pm, Berkner Hall, Room C

Come meet the FY2017 BWIS Executive Board to learn about our future events and other volunteer opportunities. We hope to see you there and bring a friend!

2. 2 pm, Small Seminar Room, Bldg. 510

Hosted by: '''Pier Paolo Giardino'''

13

1. 12:30 pm, Building 510, Room 2-160

Hosted by: ''Hiroshi Oki''

We exploit the universality between the QCD critical point and the three dimensional Ising model to derive closed form expressions for non-equilibrium critical cumulants on the crossover side of the critical point. Novel expressions are obtained for the non-Gaussian Skewness and Kurtosis cumulants; our results reveal that they can differ both in magnitude and sign from equilibrium expectations. We show further that key elements of the Kibble-Zurek framework of non-equilibrium phase transitions can be employed to describe the dynamics of these critical cumulants. As a consequence, observables sensitive to critical dynamics in heavy-ion collisions are expressible as universal scaling functions and thereby provide powerful model independent guidance in searches for the QCD critical point.

2. 6:30 pm, Berkner Hall, Room B

Hosted by: ''Nora Sundin''

14

1. 12:15 pm, Building 510, Room 2-160

Hosted by: ''Christoph Lehner''

15

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17

1. 12 pm, GYM/POOL/REC HALL

https://intranet.bnl.gov/healthfest/docs/HealthfestCalendar.pdf

18

1. 11 am, Small Seminar Room, Bldg. 510

Hosted by: 'Oleg Eyser'

In the framework of an SU(3) (axial)vector meson extended linear sigma model with additional constituent quarks and Polyakov loops, we investigate the effects of (axial)vector mesons on the chiral phase transition. The parameters of the Lagrangian are set at zero temperature and we use a hybrid approach where in the effective potential the constituent quarks are treated at one-loop level and all the mesons at tree-level. We have four order parameters, two scalar condensates and two Polyakov loop variables and their temperature and baryochemical potential dependence are determined from the corresponding field equations. We investigate the thermodynamics of the system, and at zero temperature we compare our results with lattice calculations. We calculate th phase diagram and the scalar meson masses in the hot and dense medium.

19

1. 2:30 pm, YITP Seminar Room

Jet substructure has emerged as a key tool for new physics searches at the LHC, particularly for signals that involve highly Lorentz-boosted top quarks and electroweak bosons. In this talk, I present a suite of powerful jet substructure observables that were discovered by systematically studying the soft and collinear singularities of QCD. These new observables are based on N-particle energy correlations, using a novel angular weighting function to yield improved performance over previous techniques.

20

1. 12:30 pm, Building 510, Room 2-160

Hosted by: '''Hiroshi Oki'''

We present a first-principles study of anomaly induced transport phenomena by performing real-time lattice simulations with dynamical fermions coupled simultaneously to non-Abelian SU(Nc) and Abelian U(1) gauge fields. Investigating the behavior of vector and axial currents during a sphaleron transition in the presence of an external magnetic field, we demonstrate how the interplay of the chiral magnetic and chiral separation effect leads to the formation of a propagating wave. We further analyze the dependence of the magnitude of the induced vector current and the propagation of the wave on the amount of explicit chiral symmetry breaking due to finite quark masses. Further we perform simulations using overlap-fermions for the first time in real-time, showing that in the classical statistical regime they can be related to the Wilson formulation.

2. 3 pm, Small Seminar Room, Bldg. 510

Hosted by: 'Xin Qian'

Gaseous Electron Multiplier (GEM) detectors have been widely studied and applied in many experiments. The so called zigzag readout has been studied for reading out large area GEM detectors for tracking purposes. Using of the zigzag readout can significantly reduce number of electronic channels and hence the cost of a detector while still preserving good spatial resolution on a detector. In this presentation, I will first briefly review the GEM detectors and their applications, then I will focus on the R&D activities on GEM detectors with zigzag readout for tracking at a future electron ion collider (EIC), I'll also cover some potential applications of large area GEM detectors and the zigzag readout for other experiments.

21

1. 12:15 pm, Building 510, Room 2-160

Hosted by: 'Christoph Lehner'

2. 1:30 pm, ISB Bldg. 734, Conf. Rm. 201 (upstairs)

Hosted by: 'Cedomir Petrovic'

Electrons in graphene at the Fermi level have chirality or handedness that arises from the honeycomb structure in real space. This chirality is responsible for many of the fascinating electronic properties of graphene such as Klein tunneling. In this talk, I will describe two related scanning tunneling microscopy experiments that probe the chiral nature of the electronic states in graphene. First, I will describe an experiment where we observe the chiral symmetry of graphene to be broken, resulting in a bond-ordered phase called Kekule order. I will show that this new phase in monolayer graphene can be induced by adatoms on the surface of graphene which interact electronically with each other. In a related experiment, I will describe the electronic structure of graphene in the presence of a circular potential well that separates the sheet into p (hole) and n (electron) doped regions. Electrons in these wells spend a finite amount of time before transitioning out of the well, resulting in quasibound states that can be measured in scanning tunneling spectroscopy. Due to the chirality of the electrons in graphene, the transition probabilities at the p-n junction are governed by the physics of Klein tunneling, which can be understood from the details of the energies and wavefunctions of the quasibound states observed in experiment.

22

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24

1. 11 am, Bldg 735, Seminar Room, 2nd Floor

Hosted by: 'Eric Stach'

Controlling the size and dimensionality of colloidal semiconductor nanocrystals provide powerful means to tune their properties, and accompanied by the wet chemical processing, has also opened the path for their application in various technologies ranging from bio-tagging to displays. Electronic impurity doping in such colloidal nanocrystals, however, still remains an open challenge. From the synthesis side, the introduction of a few impurity atoms into a nanocrystal which contains only a few hundred atoms may lead to their expulsion to the surface or compromise the crystal structure. From a physical viewpoint, impurities inherently create a heavily doped nanocrystal under strong quantum confinement, and the electronic and optical properties in such circumstances are still unresolved. We developed a solution based method to dope semiconductor nanocrystals with metal impurities providing control of the band gap and Fermi energy (Figure 1).1 Structural studies using Xray Absorption Spectroscopy techniques were used to determine the location of the induced impurities.2,3 A combination of optical measurements, scanning tunnelling spectroscopy and theory revealed the emergence of size dependent band-tailing effects and of a confined impurity pseudo band – signatures of heavily doped semiconductors. Ultrafast measurements investigating the carrier dynamics support the formation of the impurity pseudo band.4 Successful control of doping and its understanding, provide n- and p-doped semiconductor nanocrystals which greatly enhance the potential application of such materials in solar cells, thin-film transistors, and optoelectronic devices prepared by facile bottom-up methods.

25

1. 11 am, Small Seminar Room, Bldg. 510

Hosted by: 'Jin Huang'

In the last two decades the study of nucleon structure has shifted from a one-dimensional picture to exploring the dynamic three-dimensional structure of partons within the nucleon. In the transverse-momentum-dependent framework, nonperturbative parton distribution functions (PDFs) and fragmentation functions (FFs) explicitly carry dependence on partonic transverse momentum rather than only the collinear momentum of the parton with respect to the hadron or produced hadron with respect to the fragmenting parton. The recent interest in the transverse structure of the nucleon has largely been motivated by the novel phenomenological consequences that have been predicted for transverse-momentum-dependent nonperturbative functions. Contrary to the collinear framework, certain transverse-momentum-dependent PDFs are predicted to be process dependent. Additionally, factorization breaking has been predicted in hadronic collisions where a final-state hadron is measured and the observable is sensitive to nonperturbative transverse momentum. This prediction has the interesting quantum mechanical consequence that partons are correlated with each other across the bound state hadrons, rather than being identified with individual PDFs and FFs. Recent results from the PHENIX experiment at the Relativistic Heavy Ion Collider will be shown which investigate effects that are predicted to be sensitive to the nonperturbative factorization breaking.

2. 3:30 pm, Large Seminar Room, Bldg. 510

Hosted by: 'Peter Petreczky'

We learn in elementary school that the elements in the Periodic Table are the building blocks of our world, including our very bodies. But from where do the elements come? This is among the most basic questions we can ask, yet the precise answer remains elusive. We witness the cycle of life in our daily lives, everywhere on Earth. This is no less true in the Universe. With the exception of the lightest elements such as hydrogen and helium, elements are made in stars. As stars evolve and die, these elements pepper the interstellar medium, from which new stars, and planets, – in particular, our solar system – form. We understand the essential elements of this cycle – from stellar birth, life, and death, to the formation of the elements, to the formation of new stars and planets including those elements, to ultimately the origin of our solar system and life on Earth given those elements. But pieces of the puzzle are missing. We do not yet understand how certain stars that are factories for many of the elements, die, nor do we know the precise origin of half the elements heavier than iron, although we have narrowed down the list of possible sites. Today's colloquium will focus on the death of massive stars in catastrophic explosions known as core collapse supernovae. Such supernovae provide the lion's share of the elements between oxygen and iron, and are considered a potential site for the origin of half the elements heavier than iron. Arguably, they are the single most important source of elements in the Universe. Such supernovae present us with a general relativistic, radiation magneto-hydrodynamic – i.e., a multi-physics – environment to model. Further richness and complexity is added by the fact that the macroscopic evolution of such a system is governed in no small part by the high-density, neutron-rich, nuclear matter at the core of the supernova and by the microscopic interaction of radiation in the form of neutrinos with th

26

1. 11 am, Small Seminar Room, Bldg. 510

Hosted by: ''Chun Shen''

Relativistic hydrodynamic simulations play a key role in exploring the QGP bulk property and the QCD phase transition from analyses of high-energy heavy-ion collisions at RHIC and LHC. From the intensive study based on relativistic viscous hydrodynamic models with event-by-event initial fluctuations, we can extract detailed information of the bulk feature of the QGP such as transport coefficients and the QCD equations of states. In the quantitative analyses of the QGP property, high-precision numerical treatment on the hydrodynamic calculation is important. Recently, we developed a new 3+1 dimensional relativistic viscous hydrodynamics code in Cartesian coordinates. In the algorithm, we use a Riemann solver based on the two-shock approximation which is stable under existence of large shock waves. We extend the algorithm in Cartesian coordinates to that in Milne coordinates so that we can efficiently apply it to the analyses of relativistic heavy-ion collisions. We check the correctness of the numerical algorithm by comparing numerical calculations and analytical solutions in various problems for ideal and viscous fluids. The new numerical scheme is stable even with small numerical viscosity, which is very important to discuss the physical viscosities at RHIC and LHC.

2. 2 pm, Small Seminar Room, Bldg. 510

Hosted by: ''Pier Paolo Giardino''

3. 4 pm, Recreation Hall, Bldg. 317

Hosted by: 'T. Sampieri'

27

1. 11 am, Conference Room Bldg 815E

Hosted by: 'Laura Fierce'

Air quality exceedances in California are frequently attributed to Asian pollution, but global Eulerian models consistently fail to reproduce the intercontinental chemical plumes which are responsible. This has been attributed to excessive numerical diffusion. We apply a global model over a wide range of horizontal resolutions in both 2-D and 3-D to isolate the specific causes and effects of this diffusion on the representation of intercontinental pollution. Our results show that the vast increases in computation power required to increase model horizontal grid resolutions are wasted if the aim is to better represent intercontinental transport of pollution. We instead provide motivation for modelers and researchers to experiment with higher vertical grid resolution if they wish to reproduce the ubiquitous quasi-horizontal plumes observed in atmospheric measurements.

2. 12:30 pm, Building 510, Room 2-160

Hosted by: '''Hiroshi Oki'''

Using a hybrid (viscous hydrodynamics + hadronic cascade) framework, we model the bulk dynamics of relativistic heavy-ion collisions at the RHIC BES collision energies, including the effects from non-zero net baryon current and its dissipative diffusion during the evolution. The framework is in full 3+1 dimension which allows us to study the non-trivial longitudinal structure and dynamics of the collision systems, for example, the baryon stopping/transport. The collision energy dependence of hadronic chemistry, identified particle spectra, anisotropic flows, and HBT radii is studied from 200 GeV to 19.6 GeV. Effects of breaking boost-invariance, net-baryon current, and its related diffusion on hadronic observables will be addressed. Finally, flow prediction for recent d+Au collisions at the BES energies will be presented within the same framework.

3. OCT

27

Today

1:30 pm, Bldg. 734, ISB Seminar Rm. 201 (upstairs)

Thursday, October 27, 2016, 1:30 pm

Hosted by: 'Robert Konik'

Dirac Materials exhibit nodes in the spectra that result in the strong energy dependence of the Density of States (DOS). Collective many body instabilities in Dirac Materials are controlled by the dimensionless DOS. Hence the driven and nonequilibrium Dirac Materials offer a platform for investigation of collective instabilities of Dirac nodes via controlled tuning of the coupling constants with drive. I will present the results of investigation of the many body instabilities, like excitonic instabilities, in driven Dirac Materials. Recent optical pump experiments are consistent with the creation of long lived states away from equilibrium in Dirac Materials.

4. OCT

27

Today

4:30 pm, Hamilton Seminar Room, Bldg. 555

Thursday, October 27, 2016, 4:30 pm

28

1. OCT

28

Friday

10 am, Large Conference Room Bldg. 911B

Friday, October 28, 2016, 10:00 am

Hosted by: '''Wolfram Fischer'''

The eta meson is almost unique in the particle universe since it is a Goldstone boson and the dynamics of its decay are strongly constrained. Because the eta has no charge, decays that violate conservation laws can occur without interfering with a corresponding current. The integrated eta meson samples collected in earlier experiments have been less than 1e8 events, limiting considerably the search for such rare decays. A new experiment, REDTOP, is being proposed at the proton booster of Fermilab with the intent of collecting more than 1e12 triggers/year for studies of rare eta decays. Such statistics are sufficient for investigating several symmetry violations, and for searches for new particles beyond the Standard Model. The physics program, the accelerator systems and the detector for REDTOP will be discussed during the seminar.

2. OCT

28

Friday

11 am, Conference Room Bldg 815E

Friday, October 28, 2016, 11:00 am

Hosted by: ''Mike Jensen''

The ubiquitous presence of clouds within the troposphere (global total cloud frequency about 70%) strongly characterizes the radiative balance of the earth-atmosphere system. Knowledge of the distribution of clouds and their response to a warmer climate are crucial to anticipate the evolution of our future climate. Yet, this challenge remains subject to large uncertainties in climate modeling, wherein the vertical structure of clouds plays a crucial role. Due to the potential for significant variations in the height, temperature and microphysical properties of a cloud, there is a significant range of radiative impacts from clouds. In this presentation, I will take advantage of active sensor observations from the CALIPSO satellite and recent climate simulations from multi-model experiments to characterize systematic biases in the representation of clouds and cloud microphysics in contemporary climate models. To this end, I will introduce the satellite simulator approach, which reduces uncertainties related to instrument biases and ensures a consistent comparison between models and observations. Then, I will show a couple of examples of model biases focused on the vertical structure of clouds and the transition between supercooled liquid clouds and ice clouds. Finally, I will determine whether these biases are systematic or not, and explore their origin.

3. OCT

28

Friday

12 pm, NSLS-II Bldg 744 (LOB 4), room 156

Friday, October 28, 2016, 12:00 pm

Hosted by: 'Ben Ocko and Shirish Chodankar'

4. OCT

28

Friday

2 pm, Small Seminar Room, Bldg. 510

Friday, October 28, 2016, 2:00 pm

Hosted by: ''Heikki Mantysaari''

29

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30

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31

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1. OCT

27

Today

Condensed-Matter Physics & Materials Science Seminar

"Driven Dirac Materials"

Presented by Alexander Balatsky, Los Alamos National Laboratory

1:30 pm, Bldg. 734, ISB Seminar Rm. 201 (upstairs)

Thursday, October 27, 2016, 1:30 pm

Hosted by: 'Robert Konik'

Dirac Materials exhibit nodes in the spectra that result in the strong energy dependence of the Density of States (DOS). Collective many body instabilities in Dirac Materials are controlled by the dimensionless DOS. Hence the driven and nonequilibrium Dirac Materials offer a platform for investigation of collective instabilities of Dirac nodes via controlled tuning of the coupling constants with drive. I will present the results of investigation of the many body instabilities, like excitonic instabilities, in driven Dirac Materials. Recent optical pump experiments are consistent with the creation of long lived states away from equilibrium in Dirac Materials.

2. OCT

27

Today

Brookhaven Women In Science (BWIS) Event

"Picturing Physics: How Topology Helps Untangle the Puzzle of the Shapes of Things"

Moira Chas, Stony Brook University

4:30 pm, Hamilton Seminar Room, Bldg. 555

Thursday, October 27, 2016, 4:30 pm

3. OCT

28

Friday

"The REDTOP Experiment: Rare Eta Decays with a TPC for Optical Photons"

Presented by Dr. Corrado Gatto, FNAL and INFN

10 am, Large Conference Room Bldg. 911B

Friday, October 28, 2016, 10:00 am

Hosted by: '''Wolfram Fischer'''

The eta meson is almost unique in the particle universe since it is a Goldstone boson and the dynamics of its decay are strongly constrained. Because the eta has no charge, decays that violate conservation laws can occur without interfering with a corresponding current. The integrated eta meson samples collected in earlier experiments have been less than 1e8 events, limiting considerably the search for such rare decays. A new experiment, REDTOP, is being proposed at the proton booster of Fermilab with the intent of collecting more than 1e12 triggers/year for studies of rare eta decays. Such statistics are sufficient for investigating several symmetry violations, and for searches for new particles beyond the Standard Model. The physics program, the accelerator systems and the detector for REDTOP will be discussed during the seminar.

4. OCT

28

Friday

Environmental & Climate Sciences Department Seminar

"Using satellite observations to evaluate the representation of clouds in climate models"

Presented by Gregory Cesana, Jet Propulsion Laboratory

11 am, Conference Room Bldg 815E

Friday, October 28, 2016, 11:00 am

Hosted by: ''Mike Jensen''

The ubiquitous presence of clouds within the troposphere (global total cloud frequency about 70%) strongly characterizes the radiative balance of the earth-atmosphere system. Knowledge of the distribution of clouds and their response to a warmer climate are crucial to anticipate the evolution of our future climate. Yet, this challenge remains subject to large uncertainties in climate modeling, wherein the vertical structure of clouds plays a crucial role. Due to the potential for significant variations in the height, temperature and microphysical properties of a cloud, there is a significant range of radiative impacts from clouds. In this presentation, I will take advantage of active sensor observations from the CALIPSO satellite and recent climate simulations from multi-model experiments to characterize systematic biases in the representation of clouds and cloud microphysics in contemporary climate models. To this end, I will introduce the satellite simulator approach, which reduces uncertainties related to instrument biases and ensures a consistent comparison between models and observations. Then, I will show a couple of examples of model biases focused on the vertical structure of clouds and the transition between supercooled liquid clouds and ice clouds. Finally, I will determine whether these biases are systematic or not, and explore their origin.

5. OCT

28

Friday

NSLS-II Friday Lunchtime Seminar Series

"Energy Materials Research at SSRL"

Presented by Michael Toney, SSRL/SLAC

12 pm, NSLS-II Bldg 744 (LOB 4), room 156

Friday, October 28, 2016, 12:00 pm

Hosted by: 'Ben Ocko and Shirish Chodankar'

6. OCT

28

Friday

Nuclear Theory/RIKEN Seminar

"Perturbative QCD and beyond: Bose-Eitstein correlation and $v_n$ at any n"

Presented by Genya Levin, Tel Aviv University

2 pm, Small Seminar Room, Bldg. 510

Friday, October 28, 2016, 2:00 pm

Hosted by: ''Heikki Mantysaari''

7. NOV

1

Tuesday

Nuclear Physics Seminar

"Photon-tagged jet production in 5.02 TeV Pb+Pb and pp"

Presented by Peter Steinberg

11 am, Small Seminar Room, Bldg. 510

Tuesday, November 1, 2016, 11:00 am

Hosted by: 'Jia Jiangyong'

8. NOV

1

Tuesday

Condensed-Matter Physics & Materials Science Seminar

"Complexity in Spin-Frustrated Rock-Salt Manganites"

Presented by Alexandros Lappas, Fulbright Fellow, Institute of Electronic Structure and Laser, Foundation for Research and Technoloogy, Greece

1:30 pm, ISB Bldg. 734 Seminar room 201

Tuesday, November 1, 2016, 1:30 pm

Hosted by: ''Emil Bozin''

Complexity in transition metal oxides is the outcome of simultaneously active electron degrees of freedom (spin-charge-orbital) and their evolution under the restrictions imposed by the underlined crystal lattice. Consequently, the materials' response to competing states requires that we assess structural correlations across a wide range of length and time scales. Taking advantage of cutting-edge structural facilities accessed at neutron [1, 2], synchrotron X-ray [3] and electron microscopy [4] labs we address current limitations in understanding the crystallographic structure of layered rock-salt type triangular-lattice manganites of the AMnO2 type (A= Na, Cu). Our capability to recognize how structural rearrangements impact electronic fluctuations reflects on the spin dynamical response of such materials, seen by the complementary time-windows of 23Na-NMR and muon-spin relaxation (μ+SR) local probe methods [3, 5]. The unexpected coexistence of long- and short-range magnetic correlations due to two major opposing effects (elastic vs. magnetic exchange) of similar magnitude, lead to nearly equivalent, competing structural phases enabling infinitesimal quenched disorder to locally lift the differing degree of inherent frustration in the parent AMnO2 phase (with A= Na, TN= 45 K and A= Cu, TN= 65 K) [3]. These manganites provide a paradigm of a rarely observed nanoscale inhomogeneity in an insulating spin system, an intriguing complexity of competition due to geometrical frustration. The dramatic impact of topology and site-disorder on frustrated magnetism is further demonstrated by the hydrated variant of the NaMnO2 antiferromagnet, which gives way to a strongly interacting spin-glass state (Tf= 29 K), indicative of the subtle balance of competing processes in multivalent two-dimensional systems [6]. [1] M. Giot et al., Phys. Rev. Lett. 2007, 99, 247211. [2] C. Vecchini et al., Phys. Rev. B 2010, 82, 094404.[3] A. Zorko et al., Nat. Commun. 2014, 5[4] A.M

9. NOV

2

Wednesday

HET/RIKEN Seminars

"TBA"

Presented by Amy Nicholson, UC Berkeley

2 pm, Small Seminar Room, Bldg. 510

Wednesday, November 2, 2016, 2:00 pm

Hosted by: 'Mattia Bruno'

10. NOV

3

Thursday

BERA/Recreation

"Books Are Fun book fair"

10 am, Berkner Lobby

Thursday, November 3, 2016, 10:00 am

Do some early holiday shopping and check out all the other items in addition to books, games, educational toys, etc.

11. NOV

3

Thursday

RIKEN Lunch Seminar

"Form Invariance, Topological Fluctuations and Mass Gap of Yang-Mills Theory"

Presented by Yachao Qian, Stony Brook University

12:30 pm, Building 510, Room 2-160

Thursday, November 3, 2016, 12:30 pm

Hosted by: 'Hiromichi Nishimura'

12. NOV

4

Friday

BERA/Recreation

"Books Are Fun book fair"

10 am, Berkner Lobby

Friday, November 4, 2016, 10:00 am

Do some early holiday shopping and check out all the other items in addition to books, games, education toys, etc.

13. NOV

4

Friday

Condensed-Matter Physics & Materials Science Seminar

"Surface X-ray Diffraction for Operando Characterization of Chemical Reactions on Surfaces""

Presented by Roberto Felici, Istituto SPIN - CNR, Italy

11 am, ISB Bldg. 734, Sem. Rm. 201 (upstairs)

Friday, November 4, 2016, 11:00 am

Hosted by: ''''Ian Robinson''''

X-rays are an ideal probe for studying structural properties of matter and, thanks to the brilliance of synchrotron sources, they are also employed to determine the atomic structure and morphology of surfaces and interfaces. Surface x-ray diffraction has been originally developed to determine the static structure of surfaces. However with the development of x-ray sources, detectors and analysis tools it is now possible to characterise in detail processes which occur at surfaces. Aim of this talk is to present recent results obtained at the id03 surface diffraction beamline of the ESRF dealing with the in-situ characterization of the structure and morphology of a catalyst during a surface reaction. Examples will deal with heterogenous catalytic oxidation of CO on single crystal surfaces /1,2/ and supported nanoparticles /3/ References 1 R. van Rijn et al., Phys. Chem. Chem. Phys. 13 (2011) 13167 2 B.L. Hendriksen et al., Nat. Chem. 2 (2010) 730 3 O. Balmes, et al., Phys. Chem.Chem. Phys. 14 (2012) 4796

14. NOV

4

Friday

Nuclear Physics & RIKEN Theory Seminar

"Glue spin from lattice QCD"

Presented by Yi-Bo Yang, University of Kentucky

2 pm, Small Seminar Room, Bldg. 510

Friday, November 4, 2016, 2:00 pm

Hosted by: ''Heikki Mantysaari''

: I will present the result of the glue spin in proton from the lattice QCD simulation, and also the renormalization and matching issues. The lattice calculation is carried out with valence overlap fermions on 2+1 flavor DWF gauge configurations on four lattice spacings and four volumes including an ensemble with physical values for the quark masses. The glue spin $S_G$ in the $\overline{\text{MS}}$ scheme is obtained with the 1-loop perturbative matching. I will also discuss the generic strategy and possible difficulties of calculating the glue helicity on the lattice, from the large momentum effective theory to the lattice simulations.

15. NOV

7

Monday

Instrumentation Division Seminar

"Recent developments in Silicon Photomultiplier technology at Fondazione Bruno Kessler"

Presented by Alberto Gola, Fondazione Bruno Kessler (FBK), Italy

2:30 pm, Large Conference Room, Bldg. 535

Monday, November 7, 2016, 2:30 pm

Silicon Photomultipliers (SiPMs) are gradually replacing Photomultipler Tupbes (PMTs) in a large number of applications, offering, among other features, more sensitivity, outstanding timing performance, lower operating voltage, insensitivity to magnetic fields, lower cost and high gain uniformity. Fondazione Bruno Kessler (FBK) has been involved in SiPM development for several years and has achieved state-of-the art SiPM performance in their most typical application, which is Time-of-Flight Positron Emission Tomography (ToF-PET). While the ToF-PET application is gradually becoming an industrial product, it is interesting to consider also other emerging applications in the fields of Nuclear Medicine and High Energy Physics. These applications are made possible by the constantly improving characteristics of the SiPMs. I will describe the latest SiPM technologies developed at FBK and discuss their performance in selected applications. The most recent SiPM technologies developed at FBK are the NUV-HD and the UHD SiPMs. NUV-HD SiPMs feature a cell size between 30 um and 40 um, with peak photon detection efficiency (PDE) of 65% at 410 nm (40 um cell). Ultra-high-density (UHD) SiPMs are characterized by a cell pitch ranging between 5 um and 12.5 um. The 5 um UHD SiPM has the remarkable cell density of 46k cells/mm2 and a PDE of almost 10% at 545 nm. We have also developed a new type of position-sensitive SiPM, called linearly-graded SiPM (LG-SiPM). These applications of these detectors include: time of flight PET with LYSO:Ce and LSO:Ce with calcium co-doping, timing of Cherenkov photons from BGO, small-animal, ultra-high-resolution PET, cryogenic applications for the readout of liquid, noble-gases scintillators, applications that require high-dynamic range or radiation hardness, such as the CMS calorimeters upgrade and prompt-gamma imaging in proton therapy.

16. NOV

7

Monday

CFN Colloquium

"The role of chemical and steric environment of active sites on catalytic activity"

Presented by Prof. Dr. Johannes A. Lercher, Department of Chemistry Technische Universität München, Garching, Germany / Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA, Germany

4 pm, CFN Bldg 735, Seminar Room, 2nd Floor

Monday, November 7, 2016, 4:00 pm

Hosted by: ''Mircea Cotlet''

Understanding the elementary steps in acid-base and metal catalyzed organic transformations is a key for sustainable chemical conversions. Solid acids and bases with nano-pores such as zeolites act as solid Brønsted and Lewis acids, widely used as catalysts with well-defined acid-base sites and a well-defined reaction space around the sites. Within the pores of molecular sieves reacting molecules are constrained in a reaction space, which can be subtly adjusted via direct synthesis, as well as via the addition of cations, oxidic clusters or organic fragments. The impact of such changes on mono- and bimolecular reactions such as elimination reactions of alcohols, cracking and alkylation of hydrocarbons are discussed for gas and liquid phase reactions. Experimental methods to define the state of the reacting molecules combined with detailed kinetic analysis and theory will be used to explain the principal contributions of the interactions and the confinement to determine reaction rates. It will be discussed how reaction rates and pathways can be tailored using the space available for a transition state and the chemical constituents around the active site.

17. NOV

8

Tuesday

Office of Educational Programs Event

"Sci-Ed Day"

8 am, Berkner Hall Auditorium

Tuesday, November 8, 2016, 8:00 am

Hosted by: 'Aleida Perez'

18. NOV

8

Tuesday

Physics Colloquium

"Skyrmions and Nuclei"

Presented by Nick Manton

3:30 pm, Large Seminar Room, Bldg. 510

Tuesday, November 8, 2016, 3:30 pm

Hosted by: 'Robert Pisarski'

Nuclear forces are mediated by pions. As pions are light compared to nucleons and other mesons, they are treated as approximate Goldstone bosons in an effective field theory (EFT) with spontaneously broken SO(4) chiral symmetry. Generically, the nonlinear field equations of EFT have topological soliton solutions called Skyrmions, which we identify as the intrinsic structures of nucleons or larger nuclei. The quantum states of the unit-winding, spherical Skyrmion represent protons and neutrons with spin half. Skyrmions of many higher winding numbers are also known, having beautiful symmetries, and sometimes showing alpha-particle or other clustering. The classical solutions have definite location, orientation, and pion field orientation, so we quantize the collective coordinates to obtain states with definite momentum, spin and isospin. A Skyrmion's symmetry restricts its allowed spin/isospin combinations (Finkelstein—Rubinstein constraints). The recent inclusion of vibrational degrees of freedom has helped to create a reasonable model for Oxygen-16 and its excited states.

19. NOV

9

Wednesday

Particle Physics Seminar

"TBA"

Presented by Jo Bovy

1:30 pm, Stony Brook University

Wednesday, November 9, 2016, 1:30 pm

Hosted by: 'Neelima Sehgal'

20. NOV

9

Wednesday

HET/RIKEN Seminars

"TBA"

Presented by Chung Kao, University of Oklahoma

2 pm, Small Seminar Room, Bldg. 510

Wednesday, November 9, 2016, 2:00 pm

Hosted by: 'Pier Paolo Giardino'

21. NOV

10

Thursday

Particle Physics Seminar

"An improved ultracold neutron bottle for measuring the neutron lifetime"

10 am, Small Seminar Room, Bldg. 510

Thursday, November 10, 2016, 10:00 am

Hosted by: 'Xin Qian'

The neutron beta decay lifetime is an important parameter in theories of weak interaction and big bang nucleosynthesis. To this end, many experiments over the past several decades have sought to improve the precision of this value. Ultracold neutrons, or UCN, are neutrons with extremely low energies which can be contained by material walls; these have provided us with a useful tool in measuring the neutron lifetime. The most recent set of experiments have demonstrated a 6sigma discrepancy between two lifetime values, each obtained using a different method of measurement. The UCNtau experiment at Los Alamos Neutron Science Center, is a bottling experiment which is designed to hold UCN within a 600 liter magnet-lined bowl to store the neutrons through magnetogravitational trapping. The open topped nature of the storage vessel allows for detectors to be lowered into the UCN volume to take in-situ measurement of the surviving UCN after varying storage times. This talk will cover newly presented results from the most recent UCNtau experiment data.

22. NOV

10

Thursday

Environmental & Climate Sciences Department Seminar

"Observational constraints on mixed-phase clouds imply higher climate sensitivity"

Presented by Ivy Tan, Yale Univ.

11 am, Conference Room Bldg 815E

Thursday, November 10, 2016, 11:00 am

Hosted by: 'Robert McGraw'

Mixed-phase clouds are comprised of both liquid droplets and ice crystals. For a given total water content, mixed-phase clouds with higher liquid water contents are optically thicker and therefore more reflective to sunlight compared to those with higher ice water contents. This is due to the fact that liquid droplets tend to be smaller in size and more abundant than ice crystals in Earth's atmosphere. Given the ubiquity of mixed-phase clouds, the ratio of liquid to ice in these clouds is expected to be important for Earth's radiation budget. We determine the climatic impact of thermodynamic phase partitioning in mixed-phase clouds by using five pairs of simulations run with CAM5/CESM. Of the five pairs of simulations, the thermodynamic phase partitioning of two of the simulations were constrained to better agree with observations from CALIPSO. The other three pairs of simulations include a control simulation, as well as an upper and lower bound simulation with maximally high and low amounts of mixed-phase cloud liquid fractions. An analysis of the simulations shows that a negative "cloud phase feedback" that occurs due to the repartitioning of cloud droplets and ice crystals under global warming is weakened when mixed-phase clouds initially contain a higher amount of liquid. Simulations that exhibited weaker cloud phase feedbacks also had higher climate sensitivities. The results suggest that an unrealistically strong cloud phase feedback leading to lower climate sensitivities may be lurking in the many climate models that underestimate mixed-phase cloud liquid fractions compared to observations.

23. NOV

10

Thursday

RIKEN Lunch Seminar

"TBA"

Presented by Enrico Rinaldi, RBRC

12:30 pm, Building 510, Room 2-160

Thursday, November 10, 2016, 12:30 pm

Hosted by: 'Hiroshi Oki'

24. NOV

10

Thursday

Particle Physics Seminar

"SB/BNL Joint Cosmo Seminar: TBA"

1:30 pm, Small Seminar Room, Bldg. 510

Thursday, November 10, 2016, 1:30 pm

Hosted by: 'Anze Slosar'

25. NOV

10

Thursday

6:30 pm, Berkner Hall, Room B

Thursday, November 10, 2016, 6:30 pm

Hosted by: 'Nora Sundin'

26. NOV

15

Tuesday

Center for Functional Nanomaterials Seminar

"Controlling Quantum Dot Properties via Chemical Doping / Exploring the Impact of Intense Terahertz radiation on Chemical Reaction at the Extreme Light Infrastructure (Hungary)"

Presented by Viktor Chikan, Ph.D., Kansas State University

10 am, Bldg 735, Conference Room A, 1st Floor

Tuesday, November 15, 2016, 10:00 am

Hosted by: ''James Dickerson''

Part one: Doping Colloidal Quantum Dots Semiconductor quantum dots exhibit fascinating and important physical and chemical properties that can hold the potential to play crucial role in transforming the photovoltaic industry, creating new business opportunities and producing electricity to address the increasing global energy needs. Producing relatively efficient solar cells from quantum dots has been already demonstrated by many research groups. An important goal is to better equip these quantum dots for photovoltaic cells by controlling their electrical properties via chemical doping. The challenge of doping process is to control the chemical synthesis of these quantum dots to increase uniformity of the resulting doped quantum dots. In the discussion, gallium, tin and indium doping of CdSe quantum dots will be used as examples to highlight these challenges as well as demonstrate possible solutions for the challenges. Part 2: Building THz reaction control group at the Extreme Light Infrastructure in Hungary At the Extreme Light Infrastructure in Hungary (http://www.eli-hu.hu/), our group is implementing an experimental arrangement to study energy disposal of small fragments from photodissociation processes in the in visible energy range. With the help of ELI we will be able to carry out experiments with pulsed XUV sources to obtain insight into the dynamics of photofragmentation in the 5-20 eV with high frequency (0.01 cm-1) and high temporal resolution (attosecond to femtosecond). We will conduct experiments with the SYLOS laser source to investigate the possibility of controlling energy disposal in the samples chemical reactions and photodissociation processes. The high pulse energy will be also used to produce very strong terahertz pulses (narrow band upto 300 kV/cm) to provide an optical electric field bias during photodissociation. This optical bias will be a key experimental tool to control energy disposal in molecular fragments via a quasi-DC STARK

27. NOV

16

Wednesday

BSA Noon Recital

"Stony Brook Opera Gala"

12 pm, Berkner Hall Auditorium

Wednesday, November 16, 2016, 12:00 pm

Hosted by: 'Geoffrey Hind'

Ensemble numbers for more than the solo voice, such as duets, trios, and quartets, are the glory of opera. Ensembles to be featured include the trio "Soave sia il vento" from Mozart's Così fan tutte, the "Ice Cream" Sextet from Kurt Weill's Street Scene, and "Make Our Garden Grow" from Leonard Bernstein's Candide. Duets to be performed include the Brindisi from Verdi's La traviata and the Barcarolle from Offenbach's Les Contes d'Hoffmann. The program will also include arias from Mozart's Le Nozze di Figaro, and Bernstein's Candide, including the show-stopper "Glitter and Be Gay." The selections will be performed semi-staged with piano accompaniment and sung in the original languages, with projected titles in English. Performing these selections will be the talented young singers of Stony Brook Opera, under the musical direction of Timothy Long. Brenda Harris will stage the scenes.

28. NOV

16

Wednesday

Joint YITP/HET Seminar

"Experimental Signature of Higgs Sector Symmetries"

Presented by Scott Thomas, Rutgers

2 pm, Small Seminar Room, Bldg. 510

Wednesday, November 16, 2016, 2:00 pm

Hosted by: ''Amarjit Soni''

29. NOV

17

Thursday

Nuclear Theory/RIKEN Seminar

"TBA"

Presented by Alina Czajka, McGill

12:30 pm, Building 510, Room 2-160

Thursday, November 17, 2016, 12:30 pm

Hosted by: 'Heikki Mantysaari'

30. NOV

17

Thursday

Biology Department Seminar

"Blueprints for photosynthesis: The genetics and biochemistry of photosystem II assembly"

Presented by Robert Calderon, University of California, Berkley

3 pm, John Dunn Seminar Room, Bldg. 463

Thursday, November 17, 2016, 3:00 pm

Hosted by: ''Ian Blaby''

Photosystem II (PSII) is the protein-pigment complex in oxygenic photosynthesis that uses light energy to catalyze the oxidation of water. How the subunits and cofactors that make up this enzyme are properly assembled into a functional photosystem remains unknown. To uncover new components in this process, I undertook a chlorophyll fluorescence-based mutant screen in the unicellular green alga Chlamydomonas reinhardtii. One isolated mutant had no detectable PSII activity, whereas other components of the photosynthetic electron transport chain were still functional. This defect was shown to be due specifically to the absence of a gene, RBD1, encoding a thylakoid membrane-bound iron-sulfur protein known as a rubredoxin. Examination of cyanobacterial (Synechocystis) and plant (Arabidopsis) mutants lacking the homolog of RBD1 revealed PSII-specific phenotypes, supporting the hypothesis that this rubredoxin has a conserved role in PSII-containing organisms. The phylogenetic profile of the RBD1 gene led us to hypothesize that other genes involved in PSII assembly or function might show a similar phylogenetic distribution. We devised a computational approach to find these genes and preliminary results indicate that some genes found through this method might indeed be associated with PSII function or assembly.

31. NOV

17

Thursday

Particle Physics Seminars- SB/BNL Joint Cosmo Seminar

"A more precise and accurate route from sky images to cosmological constraints"

Presented by Gary Bernstein, U Penn

3 pm, Small Seminar Room, Bldg. 510

Thursday, November 17, 2016, 3:00 pm

Hosted by: 'Anze Slosar'

Current (e.g. DES) and future (e.g. LSST, Euclid) experiments aim to convert multiband images of the sky into precise constraints on cosmological models, neutrino masses, and modifications of general relativity. This standard path for this inference involves making point estimates of the galaxies' redshifts (from observed colors) and weak gravitational lensing distortions (from observed morphologies), then combining these into various cross-correlations and other summary statistics that are compared to numerical simulations of the Universe. These estimators require a slew of empirical corrections to various biases, and have yet to demonstrate accuracies sufficient to reduce biases below systematic errors. I describe two steps to greatly simplify this process and eliminate the need for simulation-based calibration of estimators: first, a practical means to estimate the joint posterior probability of a galaxies' redshift and line-of-sight lensing; second, a method to sample from the posterior distribution of all mass distributions and cosmologies conditional on the galaxy density and lensing data. The main advantages of the new scheme include improved lensing and photo-z accuracy (to the required part-per-thousand level), recovery of non-Gaussian information that is lost in the usual 2-point summary statistics, and correct propagation of uncertainties (including photo-z uncertainties) into the cosmological inferences.

32. NOV

18

Friday

Biology Department Seminar

"Investigating the molecular mechanism of a slowly relaxing form of photoprotection in plants"

Presented by Alizée Malnoe, University of California, Berkley, France

11 am, John Dunn Seminar Room, Bldg. 463

Friday, November 18, 2016, 11:00 am

Hosted by: 'Ian Blaby'

Nonphotochemical quenching (NPQ) comprises mechanisms by which photosynthetic organisms harmlessly dissipate excess absorbed light energy. Photoinhibitory quenching, qI, thought to be the result of photoinactivation of photosystem II, is the slowest component of NPQ to relax and is the least understood. The possibility that part of qI may be photoprotective has been little examined, in part because of the lack of mutants directly affecting qI. Through two consecutive rounds of suppressor genetic screens in the model plant Arabidopsis thaliana, we identified a factor that negatively regulates this form of energy dissipation (SOQ1) and subsequently found a factor required for this energy dissipation to occur (CHL). The CHL gene encodes for the chloroplastic lipocalin protein, which is predicted to bind small hydrophobic molecules and is hypothesized to function in the prevention and/or management of lipid peroxidation. We found that the CHL-dependent NPQ mechanism operates under stress conditions such as cold and high light, and our results suggest that SOQ1 inhibits CHL-dependent quenching under non-stress conditions. Examination of this form of energy dissipation will provide valuable clues to increase photosynthetic efficiency through crop development.

33. NOV

18

Friday

Nuclear Theory/RIKEN Seminar

"TBA"

Presented by Armen Sedrakian, Frankfurt

2 pm, Small Seminar Room, Bldg. 510

Friday, November 18, 2016, 2:00 pm

Hosted by: 'Heikki Mantysaari'

34. NOV

29

Tuesday

Physics Colloquium

"Isolated quantum systems in extreme conditions: From heavy-ion collisions to ultracold quantum gases"

Presented by Juergen Berges, University of Heidelberg

3:30 pm, Large Seminar Room, Bldg. 510

Tuesday, November 29, 2016, 3:30 pm

Hosted by: ''Rob Pisarski''

Isolated quantum systems in extreme conditions can exhibit characteristic common properties despite dramatic differences in key parameters such as temperature, density, field strength and others. The existence of universal regimes, where even quantitative agreements between seemingly disparate physical systems can be observed, drives a remarkable convergence of research activities across traditional lines of specialization. I will describe the concerted research efforts by the recently established Heidelberg Collaborative Research Center ISOQUANT in collaboration with BNL and discuss recent developments concerning the thermalization dynamics of non-Abelian plasmas and ultracold atoms.

35. NOV

30

Wednesday

Hospitality Coffee & Playgroup Event

10 am, Recreation Hall, Bldg. 317

Wednesday, November 30, 2016, 10:00 am

Play group will sometimes schedule different types of play dates at various venues. To see the schedule and join, please use https://www.facebook.com/groups/241354149387588/#!/groups/241354149387588/ and open 'BNL Spouses and Kids' and sign in. You do need an established Facebook account in order to do so.

36. NOV

30

Wednesday

HET/RIKEN Seminars

"TBA"

Presented by Luka Leskovec, University of Arizona

2 pm, Small Seminar Room, Bldg. 510

Wednesday, November 30, 2016, 2:00 pm

Hosted by: 'Mattia Bruno'

37. DEC

1

Thursday

PACCD Workshop (Precision Astronomy with Fully Depleted CCDs)

8 am, Large Seminar Room, Bldg. 510

Thursday, December 1, 2016, 8:00 am

Hosted by: 'Andrei Nomerotski'

38. DEC

1

Thursday

Blood Drive

9:30 am, Bldg 30 North Room

Thursday, December 1, 2016, 9:30 am

Hosted by: 'Long Island Blood Services'

39. DEC

1

Thursday

2016 United Way Campaign

"Holiday Shopping Fair"

11:30 am, Lobby Bldg 400

Thursday, December 1, 2016, 11:30 am

40. DEC

2

Friday

PACCD Workshop (Precision Astronomy with Fully Depleted CCDs)

8 am, Large Seminar Room, Bldg. 510

Friday, December 2, 2016, 8:00 am

Hosted by: 'Andrei Nomerotski'

41. DEC

7

Wednesday

2016 United Way Campaign

"Holiday Auction, Yard Sale & Holiday Boutique"

11 am, Berkner Lobby

Wednesday, December 7, 2016, 11:00 am

Hosted by: '''2016 United Way Campaign'''

42. DEC

7

Wednesday

Joint: YITP/HET

"TBA"

Presented by Michele Papucci, Berkeley

2:30 pm, YITP Seminar Room

Wednesday, December 7, 2016, 2:30 pm

43. DEC

8

Thursday

2016 United Way Campaign

"Holiday Auction, Yard Sale & Holiday Boutique"

11 am, Berkner Lobby

Thursday, December 8, 2016, 11:00 am

Hosted by: '2016 United Way Campaign'

44. DEC

8

Thursday

6:30 pm, Berkner Hall, Room B

Thursday, December 8, 2016, 6:30 pm

Hosted by: 'Nora Sundin'

45. DEC

14

Wednesday

HET/RIKEN Seminar

"TBA"

Presented by Hong Zhang, Ohio State University

2 pm, Small Seminar Room, Bldg. 510

Wednesday, December 14, 2016, 2:00 pm

Hosted by: 'Pier Paolo Giardino'

46. JAN

12

Thursday

6:30 pm, Berkner Hall, Room B

Thursday, January 12, 2017, 6:30 pm

Hosted by: 'Nora Sundin'

47. JAN

13

Friday

Nuclear Theory/RIKEN Seminar

"TBA"

Presented by Paulo Bedaque, University of Maryland

2 pm, Small Seminar Room, Bldg. 510

Friday, January 13, 2017, 2:00 pm

Hosted by: 'Heikki Mantysaari'

48. JAN

25

Wednesday

Joint YITP/HET Seminar

"muon colliders"

Presented by Mario Greco, Frascati

2:30 pm, YITP Seminar Room

Wednesday, January 25, 2017, 2:30 pm

49. FEB

9

Thursday

6:30 pm, Berkner Hall, Room B

Thursday, February 9, 2017, 6:30 pm

Hosted by: 'Nora Sundin'

50. MAR

9

Thursday

6:30 pm, Berkner Hall, Room B

Thursday, March 9, 2017, 6:30 pm

Hosted by: 'Nora Sundin'

51. APR

7

Friday

Nuclear Theory/RIKEN Seminar

"TBA"

Presented by Dirk Rischke, Johann Wolfgang Goethe-Universitat

2 pm, Small Seminar Room, Bldg. 510

Friday, April 7, 2017, 2:00 pm

Hosted by: 'Heikki Mantysaari'

52. APR

13

Thursday

6:30 pm, Berkner Hall, Room B

Thursday, April 13, 2017, 6:30 pm

Hosted by: 'Nora Sundin'

53. MAY

11

Thursday

6:30 pm, Berkner Hall, Room B

Thursday, May 11, 2017, 6:30 pm

Hosted by: 'Nora Sundin'

54. JUN

8

Thursday