February 2017
Sunday Monday Tuesday Wednesday Thursday Friday Saturday

1

1. 10 am, Recreation Hall, Bldg. 317

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.

2. 1 pm, CFN, Bldg. 735, conf. rm. A, first fl.

Hosted by: 'Deyu Lu'

Energy level alignment and geometric structure of organic chromophores at metal and oxide semiconductor surfaces play a critical role in photo-induced charge transfer and barriers to interfacial charge transport. We have performed systematic studies of a series of organic molecules at the TiO2(110) and at noble metal surfaces to understand the origins of energy level alignment and the relevant molecule-molecule and molecule-surface interactions that generate self-organization of these molecules at these surfaces. Combining scanning tunneling microscopy as a local probe of the molecular adsorption configuration with x-ray, ultraviolet and inverse photoemissions as probes of the electronic structure we have compared preparing monolayer molecular systems from sub-monolayer to monolayer coverage ("bottom-up") to forming a monolayer by desorption of a molecular multilayer ("top-down"). For each the metal systems, we find that the molecular monolayer assumes a metastable structure when prepared at room temperature, which converts to a different minimum energy state after annealing. Moreover, further annealing leads to a transition from intact molecular adsorption to dehydrogenation and subsequent rehybridization. This rehybridization is both intramolecular, with a flattening of the molecules and a measurable alteration of the electronic structure, and intermolecular leading to 2D-growth of extended covalently bound structures as shown in the figure. These results suggest it is possible to create ordered 1D or 2D covalently-bonded structures through direct chemical reactions at the surface. When adsorbed on TiO2(110), the chromophores align themselves along the bridging oxygen rows of this surface. However, the energy level alignment depends on both the surface concentration and electronegativity of the organic chromophore, potentially inducing important band bending in the oxide semiconductor. This work was funded by NSF and DOE. Host: Dey

3. 1:30 pm, Stony Brook University

4. 2 pm, Small Seminar Room, Bldg. 510

Hosted by: ''Amarjit Soni''

2

1. 11 am, Conference Room Bldg 815E

Hosted by: '''Jorge Gonzalez/Alice Cialella'''

Half the global population will be in cities by 2025, many having more than 10 million people. Urbanization modifies atmospheric energy and moisture balances, forming local climates, e.g. urban heat islands (UHIs) and enhanced precipitation. These produce significant challenges to science and society, e.g. flooding, heat waves strengthened by UHIs, and air pollutant hazes. The Beijing megacity experiences such severe events, e.g., 2012 flooding killed 79 and caused losses of $2B. Despite significant research into urban effects on weather and air quality, important science issues remain, e.g., urban-thermodynamic and aerosol impacts on summer convective precipitation and interactions between urban and regional climate changes. Observations are fundamental for understanding these interactions, improving forecasts, and providing useful information to end-users. Previous large urban field campaigns have not been coordinated by a group such as the Beijing Institute of Urban Meteorology (IUM), with its responsibilities for both boundary layer research and real time urban weather forecasting. The overall science objective of the 2014-8 SURF Project is thus a better understanding of urban, terrain, convection, and aerosol interactions for improved forecast accuracy. Beijing is a test case, but the improved understandings are transferable to many large cities globally. Specific objectives include: Promote cooperative international-research to improve understanding of urban weather-systems via summer thunderstorm-rainfall and winter aerosol field studies; Improve high-resolution (∼1 km grid) urban weather and air quality forecast-models; and, Enhance urban weather forecasts for societal applications, e.g., health, energy, hydrologic, climate change, air quality, urban planning, emergency-response management. 2. 3 pm, Small Seminar Room, Bldg. 510 Hosted by: 'Michael Begel' I will discuss motivations for searching for di-Higgs production at the LHC. Recent results and projected sensitivities will be presented with particular emphasis on the dominant hh->4b channel 3. 4 pm, CFN, Bldg 735, 2nd Floor Seminar Room Hosted by: 'Deyu Lu' Anatase is the form of TiO2 that is most widely used in photocatalysis and solar energy conversion. Anatase is also more active than rutile for most photocatalytic reactions, which has been attributed to various reasons such as the longer charge-carrier lifetime, the higher charge-carrier mobility, and the higher production of reactive OH radicals. In this talk I shall present recent applications of first principles electronic structure calculations and molecular dynamics simulations to study the structure and chemistry of anatase surfaces, with focus on their interactions with water and molecular oxygen, the influence of charge carriers on the reactivity, and the different behaviors of anatase and rutile. 3 1. 11 am, Bldg 735, Conference Room A, 1st Floor Hosted by: ''Dmitri Zakharov'' SerialEM is software developed for automated acquisition of TEM data developed by the Mastronarde Group at the University of Colorado Boulder. It is compatible with most of the modern TEM platforms and interfaces with a wide range of detectors from CCD, CMOS, direct detectors and STEM detectors from different manufacturers. Originally designed for acquisition of tilt series for electron tomography of (biological) specimens, SerialEM can be used for numerous different acquisition strategies due to many built-in high level commands and a flexible scripting language. Examples include the automated, large scale acquisition of high quality cryo-TEM data for molecular reconstruction or the interface with the Leica EM CRYO-CLEM system. Guenter's presentation will give a short overview on the background of SerialEM, it's user interface and basic operation, and the more complex functionalities including the navigator and the scripting language. 2. 12 pm, NSLS-II Bldg 743 (LOB 3), room 156 Hosted by: 'Ben Ocko and Shirish Chodankar' 3. 12:15 pm, Building 510, Room 2-160 Hosted by: '''Christoph Lehner''' 4 1. No events scheduled 5 1. No events scheduled 6 1. No events scheduled 7 1. No events scheduled 8 1. 1:30 pm, Stony Brook University 9 1. 11 am, Conference Room Bldg 815E Hosted by: 'Robert McGraw' A newly developed box model, MATRIX-VBS [Gao et al., 2017], includes the volatility-basis set (VBS) framework in an aerosol microphysical scheme MATRIX (Multiconfiguration Aerosol TRacker of mIXing state) [Bauer et al., 2008], which is a module within GISS ModelE that resolves aerosol mass and number concentrations and aerosol mixing state. By including the gas-particle partitioning and chemical aging of semi-volatile organic aerosol in MATRIX, we were able to examine its effects on the growth, composition and mixing state of particles. MATRIX-VBS is unique and advances the representation of organic aerosols in Earth system models by greatly improving the traditional and very simplistic treatment of organic aerosols as non-volatile and with a fixed size distribution. Idealized cases representing Beijing, Mexico City, a Finnish and a Southeast U.S. forest were simulated, and we investigated the evolution of mass concentrations and volatility distributions for organic species across the gas and particle phases, as well as their mixing state among aerosol populations. To test and simplify the model, a Monte-Carlo analysis is performed to pin point which processes affect organics the most under varied chemical and meteorological conditions. Since the model's parameterizations have the ability to capture a very wide range of conditions, all possible scenarios on Earth across the whole parameter space, including temperature, humidity, location, emissions and oxidant levels, are examined. These simulations provide information on which parameters play a critical role in the aerosol distribution and evolution in the atmosphere and which do not, and that will facilitate the simplification of the box model, an important step in its implementation in the global model GISS ModelE as a module. 2. 3 pm, Small Seminar Room, Bldg. 510 Hosted by: ''Mike Creutz'' 10 1. 12 pm, NSLS-II Bldg 743 (LOB 3), room 156 Hosted by: 'Ben Ocko and Shirish Chodankar' 2. 12:15 pm, Building 510, Room 2-160 Hosted by: 'Christoph Lehner' 11 1. No events scheduled 12 1. No events scheduled 13 1. 6:30 pm, Berkner Hall, Room B Hosted by: ''Nora Sundin'' 14 1. 1 pm, Building 510, Room 2-160 Hosted by: ''Mike Creutz'' 2. 1:30 pm, Bldg. 734, ISB Conference Room 201 (upstairs) Hosted by: '''Robert Konik''' Thermalization, a common phenomenon in various physical settings, can naturally fail in certain isolated disordered quantum systems, challenging basic tenets of quantum statistical mechanics. Many body localization (MBL) is a canonical example of such an intriguing scenario and, therefore, attracted tremendous attention from condensed matter, statistical physics, and atomic physics communities. Considerable effort has recently gone into establishing the existence of the MBL phase, and the nature of dynamical phase transition from MBL to the thermal phase. However, understanding instabilities to the MBL phase that may lead to the complete or partial restoration of thermalization is still an open question. In this talk, I would focus on two such instabilities to the MBL phase coming from single particle mobility edge and the presence of extensive degeneracy in the many body spectrum. The goal is to identify the most robust form of MBL (in the presence of instabilities) to gain insight into the mechanisms of quantum thermalization. 3. 2 pm, John Dunn Seminar Room, Bldg. 463 Hosted by: 'Sushil Sharma and Mary Carlucci-Dayton' The Hard X-ray Nanoprobe (HXN) beamline at NSLS-II has been designed and constructed to enable imaging experiments with unprecedented spatial resolution and detection sensitivity. The HXN x-ray Microscope is a key instrument for the beamline, providing a suite of experimental capabilities which includes scanning fluorescence, diffraction, differential phase contrast and ptychography utilizing Multilayer Laue Lenses (MLL) and zone plates (ZP) as nanofocusing optics. During this presentation, different phases of the X-ray microscope development process will be reviewed. Various prototype systems designed and constructed prior to completion of the HXN-microscope will be discussed. Experimental data demonstrating ~15 x 15 nm spatial resolution imaging using MLL optics will be presented. I will discuss instrumentational challenges associated with high spatial resolution imaging and will outline future development plans. 4. 3:30 pm, Large Seminar Room, Bldg. 510 Hosted by: ''Robert Pisarski'' Describing heavy-ion collisions as hydrodynamical explosions of liquid of quarks and gluons has been a tremendous phenomenological success. A major uncertainty in such modeling arises from what happens during the first 1fm/c of the evolution during which the system is far from local thermal equilibrium. I will describe how the postcollision debris start behaving hydrodynamically, and how the phenomenological modeling of the prehydrodynamical evolution can be improved. 15 1. 10 am, Recreation Hall, Bldg. 317 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. 2. 1:30 pm, Stony Brook University 3. 2 pm, Small Seminar Room, Bldg. 510 Hosted by: 'Mattia Bruno' 16 1. 12:30 pm, Building 510, Room 2-160 Hosted by: 'Heikki Mantysaari' In this talk, I plan to discuss the recent theoretical progress towards the exploration of the gluon saturation phenomenon in pA collisions and at the future EIC. Two important pillars of this exploration are the single inclusive forward hadron productions and forward dijet correlations, which have both been computed up to one-loop order within the small-x factorization formalism. Complementary measurements in pA collisions and at the EIC can help us measure small-x gluon distributions and test the generalized small-x factorization. In addition, DIS diffractive dijet process is another interesting process which is sensitive to the dipole Wigner gluon distributions. This process can provide us 3D tomographic images of low-x gluons inside high energy protons and nuclei. 2. 4:30 pm, Large Seminar Room, Bldg. 510 The death of massive stars is accompanied by dramatic phenomena, known as supernovae, shining with the luminosity of over a billion of Suns. A subset of these supernovae are also accompanied by strong explosive events in gamma-rays, known as gamma-ray bursts. These are the most energetic explosions that we have witnessed in the Universe. Once the explosion is over, what is left behind are exotic compact objects, known as neutron stars and black holes. In this talk I will describe some of my research on gamma-ray bursts, as well as on neutron stars and black holes. I will particularly discuss a subset of neutron stars, known as 'magnetars', which are the strongest magnetized objects known in the Universe. 17 1. 11 am, Seminar Room, Bldg. 725 Hosted by: 'Wei Xu' The X-ray computed tomography (CT) has been widely utilized as a nondestructive diagnostic means to visualize internal structures of human body. However, high radiation exposure in X-ray CT has been an important issue as it will increase the risk of cancer. Unfortunately, CT data acquired at low radiation doses adversely affects the quality if the reconstructions, impeding their readability. Therefore, current research is focusing on developing a SAFE (Safe, Accurate, Flexible, and Efficient) X-ray CT system in three aspects to handle reduced X-ray dose levels without compromising image quality. The first part of this research is in developing time efficient forward- and back-projection operators that are the most time-consuming parts in 3D CT reconstruction algorithms. The proposed method that is called Lookup Table-based Ray Integration (LTRI) method encapsulates 2D/3D CT geometric properties in two lookup tables to replace complex arithmetic operations with one or two memory fetching operations and it results in 4 times faster than the state-of-the-art method under modern graphics processing unit (GPU) architecture. With the novel CT projectors, iterative coordinate descent (ICD) based statistical iterative CT reconstruction algorithm is accelerated using GPU by seeking for parallelizable voxels in axial direction. we can achieve more than x90 times speed-up with cone-beam CT clinical dataset compared to the standard single voxel update scheme in ICD. The second part of this research is in utilizing the external knowledge that already exists in the domain of reconstructed high-quality CT scans to restore low-quality CT scans suffering from harsh noise and streak artifacts. We can incorporate this knowledge by creating a database (Big Data) of high-quality CT scans, either of the same patient or a diverse corpus of different patients, to assist in the restoration process since after all this is what radiologists do when they examine these low-quality CT images 2. 12 pm, NSLS-II Bldg 743 (LOB 3), room 156 Hosted by: 'Ben Ocko and Shirish Chodankar' 3. 12:15 pm, Building 510, Room 2-160 Hosted by: ''Christoph Lehner'' The collection of a few anomalies in semileptonic$B$-decays, especially in$b \to c \tau \bar{\nu}$invites us to speculate about the emergence of some striking new phenomena, perhaps interpretable in terms of a weakly broken$U(2)^n$flavor symmetry and of leptoquark mediators. Here we aim at a partial UV completion of this interpretation by generalizing the minimal composite Higgs model to include a composite vector leptoquark as well. Reference: arXiv:1611.04930 w/ R. Barbieri and F. Senia 4. 2 pm, Small Seminar Room, Bldg. 510 Hosted by: 'Chun Shen' 18 1. No events scheduled 19 1. No events scheduled 20 1. No events scheduled 21 1. No events scheduled 22 1. 10 am, Recreation Hall, Bldg. 317 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. 2. 2 pm, Small Seminar Room, Bldg. 510 Hosted by: 'Mattia Bruno' 23 1. FEB 23 Today 12:30 pm, Building 510, Room 2-160 Thursday, February 23, 2017, 12:30 pm Hosted by: ''Hiromichi Nishimura'' Relativistic hydrodynamics is formulated based on the assumption that systems are almost in local thermal equilibrium. However, a quantum field theoretical way to handle such a locally thermalized system has not been clearly clarified. In this study, we develop a complete path-integral formulation of relativistic quantum fields in local thermal equilibrium, which brings about the emergence of thermally induced curved spacetime. The obtained path-integral formula for local thermal equilibrium enables us to derive nondissipative part of hydrodynamic constitutive relations based on symmetry arguments. As one application, we discuss a field theoretical derivation of anomalous hydrodynamics which captures the chiral magnetic/vortical effects. 24 1. FEB 24 Friday 12:15 pm, Building 510, Room 2-160 Friday, February 24, 2017, 12:15 pm Hosted by: 'Christoph Lehner' 2. FEB 24 Friday 2 pm, Small Seminar Room, Bldg. 510 Friday, February 24, 2017, 2:00 pm Hosted by: ''Heikki Mantysaari'' We show for the first time in over 50 years how to correctly apply the Kinoshita-Lee-Nauenberg theorem diagrammatically in a next-to-leading order scattering process. We improve on previous works by including all initial and final state soft radiative processes, including absorption and an infinite sum of partially disconnected amplitudes. Crucially, we exploit the Monotone Convergence Theorem to prove that our delicate rearrangement of this formally divergent series is correct. This rearrangement yields a factorization of the infinite contribution from the initial state soft photons that then cancels in the physically observable cross section. We derive the first complete next-to-leading order, high-energy Rutherford elastic scattering cross section in the MSbar renormalization scheme as an explicit example of our procedure. 25 1. No events scheduled 26 1. No events scheduled 27 1. No events scheduled 28 1. FEB 28 Tuesday 3:30 pm, Large Seminar Room, Bldg. 510 Tuesday, February 28, 2017, 3:30 pm Hosted by: 'Andrei Nomerotski' 1. FEB 23 Today RIKEN Lunch Seminar "Path-integral formula for local thermal equilibrium" Presented by Masaru Hongo, RIKEN 12:30 pm, Building 510, Room 2-160 Thursday, February 23, 2017, 12:30 pm Hosted by: ''Hiromichi Nishimura'' Relativistic hydrodynamics is formulated based on the assumption that systems are almost in local thermal equilibrium. However, a quantum field theoretical way to handle such a locally thermalized system has not been clearly clarified. In this study, we develop a complete path-integral formulation of relativistic quantum fields in local thermal equilibrium, which brings about the emergence of thermally induced curved spacetime. The obtained path-integral formula for local thermal equilibrium enables us to derive nondissipative part of hydrodynamic constitutive relations based on symmetry arguments. As one application, we discuss a field theoretical derivation of anomalous hydrodynamics which captures the chiral magnetic/vortical effects. 2. FEB 24 Friday HET Lunch Discussions "Inclusive tau decays" Presented by Taku Izubuchi, BNL 12:15 pm, Building 510, Room 2-160 Friday, February 24, 2017, 12:15 pm Hosted by: 'Christoph Lehner' 3. FEB 24 Friday Nuclear Theory Seminar "A Complete Diagrammatic Implementation of the Kinoshita-Lee-Nauenberg Theorem at Next-to-Leading Order" Presented by Will Horowitz, University of Cape Town 2 pm, Small Seminar Room, Bldg. 510 Friday, February 24, 2017, 2:00 pm Hosted by: ''Heikki Mantysaari'' We show for the first time in over 50 years how to correctly apply the Kinoshita-Lee-Nauenberg theorem diagrammatically in a next-to-leading order scattering process. We improve on previous works by including all initial and final state soft radiative processes, including absorption and an infinite sum of partially disconnected amplitudes. Crucially, we exploit the Monotone Convergence Theorem to prove that our delicate rearrangement of this formally divergent series is correct. This rearrangement yields a factorization of the infinite contribution from the initial state soft photons that then cancels in the physically observable cross section. We derive the first complete next-to-leading order, high-energy Rutherford elastic scattering cross section in the MSbar renormalization scheme as an explicit example of our procedure. 4. FEB 28 Tuesday Physics Colloquium "The Experimental Challenge of 21 cm Cosmology, host A.Nomerotski" Presented by Miguel Morales, University of Washington 3:30 pm, Large Seminar Room, Bldg. 510 Tuesday, February 28, 2017, 3:30 pm Hosted by: 'Andrei Nomerotski' 5. MAR 1 Wednesday Hospitality Coffee & Playgroup Event 10 am, Recreation Hall, Bldg. 317 Wednesday, March 1, 2017, 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. 6. MAR 1 Wednesday NSLS-II "NSLS-II Town Meeting" 1 pm, NSLS-II Building 745, Conference Room 156 Wednesday, March 1, 2017, 1:00 pm Hosted by: 'NSLS-II UEC' 7. MAR 1 Wednesday Particle Physics Semiar SB/BNL Joint Cosmo Seminar "TBA" Presented by Will Farr, Birmingham 1:30 pm, Stony Brook University Wednesday, March 1, 2017, 1:30 pm 8. MAR 2 Thursday RIKEN Lunch Seminar "Generalized Nambu-Goldstone theorem" Presented by Yoshimasa Hidaka, RIKEN 12:30 pm, Building 510, Room 2-160 Thursday, March 2, 2017, 12:30 pm Hosted by: 'Hiromichi Nishimura' 9. MAR 2 Thursday Condensed-Matter Physics & Materials Science Seminar "Ab Initio electronic structure of solids: correlation effects beyond the GW method" Presented by Andrei Kutepov, Rutgers University 1:30 pm, Bldg. 734, ISB Conference Room 201 (upstairs) Thursday, March 2, 2017, 1:30 pm Hosted by: ''''Gabi Kotliar'''' TBA 10. MAR 3 Friday Computational Science Initiative Event "Addressing Big Data Challenges in Extreme-Scale Science" Presented by Manish Parashar, Rutgers University 11 am, Seminar Room, Bldg. 725 Friday, March 3, 2017, 11:00 am Hosted by: 'Kerstin Kleese van Dam' Data-related challenges are quickly dominating computational and data-enabled sciences, and are limiting the potential impact of scientific application workflows enabled by current and emerging extreme scale, high-performance distributed computing environments. These data-intensive application workflows involve dynamic coordination, interactions and data coupling between multiple application processes that run at scale on different resources, and with services for monitoring, analysis and visualization and archiving, and present challenges due to increasing data volumes and complex data-coupling patterns, system energy constraints, increasing failure rates, etc. In this talk I will explore these data challenges in extreme scale science and investigate how solutions based on data sharing abstractions, managed data pipelines, in-memory data-staging, in-situ placement and execution, and in-transit data processing can be used to address these data challenges at extreme scales. This research is part of the DataSpaces project at the Rutgers Discovery Informatics Institute. 11. MAR 8 Wednesday Hospitality Coffee & Playgroup Event 10 am, Recreation Hall, Bldg. 317 Wednesday, March 8, 2017, 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. 12. MAR 8 Wednesday Particle Physics Seminar "Electroweak Physics at ATLAS" Presented by Jake Searcy, Michigan 11 am, Small Seminar Room, Bldg. 510 Wednesday, March 8, 2017, 11:00 am Hosted by: 'Michael Begel' Electroweak symmetry breaking is a central pillar of the standard model, and experimentally one of the least understood. Many physics scenarios predict modifications to this mechanism resulting in new particles or interactions. This talk will summarize our knowledge of the electroweak sector with a particular focus on the interactions between W-bosons. 13. MAR 9 Thursday Condensed-Matter Physics & Materials Science Seminar "TBD" Presented by Xiaoyu Deng, Rutgers 11 am, Bldg. 734, ISB Conference Room 201 (upstairs) Thursday, March 9, 2017, 11:00 am Hosted by: 'Gabi Kotliar' TBD 14. MAR 9 Thursday Particle Physics Seminar "WW measurements at CMS and perspectives for the HL-LHC" Presented by Rafael Coelho Lopes de Sa, FNAL 3 pm, Small Seminar Room, Bldg. 510 Thursday, March 9, 2017, 3:00 pm Hosted by: 'Michael Begel' We will review recent diboson measurements and searches in the WW final state performed with the CMS detector. We will discuss the perspectives for some of these measurements with the full HL-LHC dataset. We will briefly describe some of the upgrades being designed for the CMS Silicon Tracker in order to operate in the high pileup environment of the HL-LHC while maintaining excellent performance for the final states discussed in this talk. 15. MAR 9 Thursday Open Mic Night @ the Center "Open Mic Night presented by AAAG" 4:30 pm, Brookhaven Center Thursday, March 9, 2017, 4:30 pm Hosted by: 'African American Affinity Group' Open Mic Night is back! Tickets$10 in BERA Store. All talent is welcome - singers, spoken word, musicians, comedy, poetry (acts must be PG-13). Refreshments will be served.

16. MAR

9

Thursday

6:30 pm, Berkner Hall, Room B

Thursday, March 9, 2017, 6:30 pm

Hosted by: 'Nora Sundin'

17. MAR

10

Friday

Tax Overview Workshop for Visiting Foreign Nationals

"Tax Overview Workshop"

12 pm, Bldg 400, RSB #1

Friday, March 10, 2017, 12:00 pm

Please RSVP to ccarter@bnl.gov Bring your lunch and coffee will be provided.

18. MAR

10

Friday

Nuclear Theory Seminar

"Nuclear Matter EoS and thermodynamic Properties of Skyrme models"

Presented by Mareike Haberichter, Amherst

2 pm, Small Seminar Room, Bldg. 510

Friday, March 10, 2017, 2:00 pm

Hosted by: 'Heikki Mantysaari'

The Skyrme model is a candidate to describe the low energy regime of QCD where baryons and nuclei are topological excitations in a low-energy effective field theory of pions. The Skyrme model and its BPS variant (Skyrme model with a lower topological energy bound which is saturated) have been applied to the description of nuclei with notable recent success, e.g. quantitative description of Carbon-12 (including the Holye state and its rotational band) and of the low-lying energy spectrum of Oxygen-16. In this talk, we test Skyrme theories as models for nuclear matter at high densities and explore the thermodynamical properties of skyrmionic matter at zero temperature. We compute analytically the mean-field equation of state in the high and medium pressure regimes by applying topological bounds on compact domains. We identify which term in a generalised Skyrme model is responsible for which part in the equation of state and compare our findings with the corresponding results in the Walecka model. We find that the BPS submodel plays the dominant role at large densities. The BPS Skyrme model even allows us to derive thermodynamical variables and densities directly from the theory without having to perform a mean-field limit. This distinguishes the BPS Skyrme model from other models of nuclear matter where usually a mean-field limit has to be performed. Note that this is the first of two talks on Skyrme models and their predictions for nuclear matter at high densities. The second part on the description of neutron stars as Skyrme solitons will be given by Carlos Naya (Durham) on March, 24th at BNL.

19. MAR

14

Tuesday

Nuclear Physics Seminar

"The sPHENIX Calorimeters: a proto-type story"

Presented by Megan Connors, Georgia State University and RBRC

11 am, Small Seminar Room, Bldg. 510

Tuesday, March 14, 2017, 11:00 am

Hosted by: 'Jin Huang'

sPHENIX, scheduled to start taking data in 2022 at RHIC, is a detector designed to probe the inner workings of the quark gluon plasma by measuring jets and their substructure, heavy flavor tagged jets and quarkonia. The design includes tracking systems, a solenoid magnet and calorimeter system. The calorimeter system, designed to measure the energy of jets, is comprised of an electromagnetic calorimeter, an inner hadronic calorimeter and and outer hadronic calorimeter. Prototypes of these detectors were built and tested in 2016. The results of the test beam show that the performance is well within the requirements set by the sPHENIX program. In addition, the results validate the GEANT4 simulation studies. The design of the sPHENIX calorimeter system, the test beam results from the calorimeter prototypes and additional studies will be presented

20. MAR

14

Tuesday

Physics Colloquium

"TBA"

Presented by Bob McKeown, Jefferson Lab

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

Tuesday, March 14, 2017, 3:30 pm

Hosted by: 'Andrei Nomerotski'

21. MAR

15

Wednesday

Hospitality Coffee & Playgroup Event

10 am, Recreation Hall, Bldg. 317

Wednesday, March 15, 2017, 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.

22. MAR

15

Wednesday

HET/RIKEN Seminar

"TBA"

Presented by Brian Shuve, SLAC

2 pm, Small Seminar Room, Bldg. 510

Wednesday, March 15, 2017, 2:00 pm

Hosted by: 'Pier Paolo Giardino'

23. MAR

16

Thursday

Particle Physics Seminar

"Search for physics beyond the SM using multijet events with the ATLAS detector at the LHC"

Presented by Haichen Wang, LBL

11 am, Small Seminar Room, Bldg. 510

Thursday, March 16, 2017, 11:00 am

Hosted by: ''Michael Begel''

Search for physics beyond the Standard Model (SM) has been one of the most important goals of the physics program at the Large Hadron Collider (LHC).Among all the final states, the multijet final state has long been considered as a challenging one for the search of physics beyond the SM due to its large background. Though, exciting new physics phenomena, such as the production of black hole as well as massive supersymmetric (SUSY) particles, may well result in signals in multijet final state. I present searches for physics beyond the SM using multijet events from 13 TeV collision data taken in 2015 and the first half of 2016 by the ATLAS experiment at the LHC. I focus on a search for the production of black hole and a search for massive supersymmetric particles decaying to many jets via R-Parity Violating (RPV) couplings. The two examples represent searches targeting physics beyond the SM at different mass scales, and therefore different analysis strategies are employed. These searches have greatly improved the sensitivity of the LHC to the black hole production and RPV SUSY scenarios, and they are complementary to searches using events of leptons, photons and missing transverse energy.

24. MAR

16

Thursday

CFN Colloquium

"Tricking Block Copolymers into Forming New Morphologies"

Presented by Kevin Yager, CFN / BNL

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

Thursday, March 16, 2017, 4:00 pm

Hosted by: 'Oleg Gang'

Block copolymer self-assembly allows the rapid formation of nanostructures over wide areas. Yet, the range of possible patterns is fairly limited. I will present emerging strategies for constructing three-dimensional nanostructures whose shapes and symmetries go beyond those of the bulk equilibrium diblock copolymer phase diagram. Photo-thermal methods are used to accelerate assembly, and control block copolymer ordering and orientation. Self-assembly is known to be pathway-dependent, which can be exploited to select a particular nano-pattern. Ordered layers can be stacked to yield new lattice symmetries. This multi-layered ordering can be performed in a responsive mode, where each self-assembled layer templates the ones that follow. Taken together, these new motifs point towards the ability to construct designed, multi-functional 3D nanostructures.

25. MAR

22

Wednesday

Office of Educational Programs Event

"MagLev Competition"

8:30 am, Brookhaven Center

Wednesday, March 22, 2017, 8:30 am

Hosted by: 'Aleida Perez'

26. MAR

22

Wednesday

Hospitality Coffee & Playgroup Event

10 am, Recreation Hall, Bldg. 317

Wednesday, March 22, 2017, 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.

27. MAR

22

Wednesday

Particle Physics Seminar

"Heavy bosons: a probe into the unknown"

Presented by Viviana Cavaliere, University of Illinois Champaign/Urbana

11 am, Small Seminar Room, Bldg. 510

Wednesday, March 22, 2017, 11:00 am

Hosted by: ''Michael Begel''

The large amount of high-energy proton-proton collision data at the LHC provides an unprecedented opportunity to search for new physics beyond the Standard Model at the TeV scale. The 2012 discovery of a 125 GeV Higgs boson opened a new door to understanding the universe, providing an exciting new tool to use in these searches, given it is now produced about once per second at the current collision rate. The talk will review recent ATLAS searches for physics beyond the Standard Model, focusing on the central role of processes with heavy bosons, including the Higgs, and the corresponding new possible signatures that range from spectacular new resonances to subtle changes in kinematic distributions.

28. MAR

24

Friday

Long Island Environment

"2017 Long Island Natural History Conference"

Presented by Various

8 am, Berkner Hall Auditorium

Friday, March 24, 2017, 8:00 am

Hosted by: 'Tim Green'

29. MAR

24

Friday

Particle Physics Seminar

"Neutrino Interactions with Nuclei and Long-Baseline Experiments"

Presented by Professor Ulrich Mosel, Giessen University

10 am, Small Seminar Room, Bldg. 510

Friday, March 24, 2017, 10:00 am

Hosted by: ''Xin Qian''

The extraction of neutrino mixing parameters and the CP-violating phase requires knowledge of the neutrino energy. This energy must be reconstructed from the final state of a neutrino-nucleus reaction since all long-baseline experiments use nuclear targets. This reconstruction requires detailed knowledge of the neutrino reactions with bound nucleons and of the final state interactions of hadrons with the nuclear environment. Quantum-kinetic transport theory can be used to build an event generator for this reconstruction that takes basic nuclear properties, such as binding, into account. Some examples are discussed that show the effects of nuclear interactions on observables in long-baseline experiments.

30. MAR

24

Friday

Nuclear Theory/RIKEN Seminar

"A solitonic approach to neutron stars: The (BPS) Skyrme model"

Presented by Carlos Naya, Durham

2 pm, Small Seminar Room, Bldg. 510

Friday, March 24, 2017, 2:00 pm

Hosted by: 'Heikki Mantysaari'

The Skyrme model is a low energy effective field theory of strong interactions where nuclei and baryons appear as collective excitations of pionic degrees of freedom. Proposed by Tony Skyrme in the sixties, his ideas received further support when it was discovered that in the limit of the large number of colours of QCD, an effective theory of mesons arises. In the last years, there has been a revival of Skyrme's ideas and new related models, some of them with BPS bounds (topological lower energy bounds), have been proposed. It is the aim of this talk to focus on the one known as BPS Skyrme model. After a brief introduction to this BPS limit we study its application to neutron stars where we will find that high maximal masses are supported. In addition, the BPS Skyrme model allow us to perform both mean-field and exact calculations and a comparison between both approaches will be presented.

31. MAR

25

Saturday

Long Island Environment

"2017 Long Island Natural History Conference"

Presented by Various

8 am, Berkner Hall Auditorium

Saturday, March 25, 2017, 8:00 am

Hosted by: 'Tim Green'

32. MAR

28

Tuesday

Condensed-Matter Physics & Materials Science Seminar

"TBD"

Presented by Stefan Groha, University of Oxford, United Kingdom

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

Tuesday, March 28, 2017, 1:30 pm

Hosted by: 'Neil Robinson'

TBD

33. MAR

28

Tuesday

Physics Colloquium

"TBA"

Presented by Carl Bender, Washington University

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

Tuesday, March 28, 2017, 3:30 pm

Hosted by: 'Robert Pisarski'

34. MAR

29

Wednesday

Hospitality Coffee & Playgroup Event

10 am, Recreation Hall, Bldg. 317

Wednesday, March 29, 2017, 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.

35. MAR

30

Thursday

Particle Physics Seminar

"Evaluation of reactor neutrino flux: issues and uncertainties"

Presented by Professor Petr Vogel, Caltech

3 pm, Small Seminar Room, Bldg. 510

Thursday, March 30, 2017, 3:00 pm

Hosted by: 'Xin Qian'

Evaluation of the reactor antineutrino flux and spectrum is an essential ingredient of their application in the neutrino oscillation studies. Two anomalies, i.e. discrepancies between the observed and expected count rates, are widely discussed at the present time. The total rate is about 6% lower than the expectation at all distances > 10 m from the reactor. And there is a shoulder (often referred to as "bump") at neutrino energies 5-7 MeV, not predicted in the calculated spectrum. I review the ways the flux and spectrum is evaluated. I argue that far reaching conclusions based on these anomalies should await a thorough understanding of the uncertainties of the spectrum, and point out possible standard physics sources of the anomalies.

36. MAR

31

Friday

Particle Physics Seminar

"neutrinoless double beta decay and nuclear structure theory"

Presented by Professor Petr Vogel, Caltech

10 am, Small Seminar Room, Bldg. 510

Friday, March 31, 2017, 10:00 am

Hosted by: 'Xin Qian'

Search for the neutrinoless double beta decay is one of the main goals of nuclear physics community worldwide. If observed, it would be an example of "physics beyond the Standard Model", showing that the lepton number is not a conserved quantity and that neutrinos are massive Majorana fermions. After introducing the subject and its particle physics consequences I will concentrate on the issue of evaluation of the nuclear matrix elements. Despite decades of effort and hundreds of publications, different approaches give results that differ by roughly a factor of three, and it is difficult to decide which of them is the most realistic. I will describe the strengths and weaknesses of the nuclear models used. In addition, I will discuss the problem of "quenching", i.e. of reduction of the matrix elements of weak axial current in complex nuclei, that potentially affects the neutrinoless double beta decay matrix element values signiffcantly

37. APR

5

Wednesday

Hospitality Coffee & Playgroup Event

10 am, Recreation Hall, Bldg. 317

Wednesday, April 5, 2017, 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.

38. APR

5

Wednesday

HET Seminar

"TBA"

Presented by Diptimoy Ghosh, Weizman

2 pm, Small Seminar Room, Bldg. 510

Wednesday, April 5, 2017, 2:00 pm

Hosted by: 'Amarjit Soni'

39. APR

6

Thursday

CFN Colloquium

"TBD"

Presented by Carl Mesters, Shell

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

Thursday, April 6, 2017, 4:00 pm

Hosted by: ''Dario Stacchiola''

TBD

40. 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'

41. APR

13

Thursday

Particle Physics Seminar

"Natural Seesaw in Warped/Composite Higgs framework and its LHC Signals"

Presented by Kaustubh Agashe, University of Maryland

3 pm, Small Seminar Room, Bldg. 510

Thursday, April 13, 2017, 3:00 pm

Hosted by: ''Christoph Lehner''

I will show how a natural seesaw model for SM neutrino mass arises within the general framework of a warped extra dimension (dual to composite Higgs in 4D). It starts out as an attempt at implementing the high-scale seesaw mechanism. I will first carefully determine what the underlying dynamical picture really is. Motivated by this physical understanding, LHC signals of TeV-mass SM singlet neutrinos within a specific model for the electroweak gauge sector will be discussed. Some of these channels are similar to those studied in 4D left-right (LR) symmetric models, but nonetheless the two can be distinguished. While other signals are more characteristic of the 5D/composite framework, i.e., are absent in 4D LR models.

42. APR

13

Thursday

6:30 pm, Berkner Hall, Room B

Thursday, April 13, 2017, 6:30 pm

Hosted by: 'Nora Sundin'

43. APR

20

Thursday

Condensed-Matter Physics & Materials Science Seminar

"Unpaired Spins in Superconductors: From Assassin to Enabler"

Presented by Jeffrey Lynn, NIST Center for Neutron Research, National Institute of Standards and Technology

11 am, Bldg. 734, ISB Conference Room 201 (upstairs)

Thursday, April 20, 2017, 11:00 am

Hosted by: '''Igor Zaliznyak'''

The magnetic properties of superconductors have a rich and interesting history, and we will briefly review some highlights. Early work showed that even tiny concentrations of magnetic impurities destroyed the superconducting pairing through the exchange-driven spin depairing mechanism, prohibiting any possibility of magnetic order coexisting with superconductivity. The first exceptions to this rule were provided by the cubic rare-earth substituted CeRu2 alloys, followed by the ternary Chevrel-phase superconductors (e.g. HoMo6S8) and related compounds, where long range magnetic order coexists or competes with superconductivity. The very low magnetic ordering temperatures (~1 K) suggested that dipolar rather than exchange interactions dominate, thus (it was thought) allowing the coexistence. These materials also provided the first examples of the competition between ferromagnetism and superconductivity. In the newer borocarbide class of magnetic superconductors (e.g. ErNi2B2C), however, it became clear that the magnetic order is in fact exchange driven. The borocarbides also provided the first example of the spontaneous formation of flux quanta (vortices). For the cuprate and iron-based superconductors (formerly known as "high Tc") we now have come full circle, as the spins are not only tolerated but are intimately tied to the superconductivity. The "parent" cuprate systems are Mott-Hubbard antiferromagnetic insulators with very strong magnetic interactions that are two-dimensional in nature. These strong exchange interactions survive into the superconducting state, yielding highly correlated electrons that participate directly in the superconducting pairing. The "parent" materials of the new iron-based high TC superconductors are also antiferromagnets with very energetic spin excitations, and in the superconducting regime they form a "magnetic resonance" that is directly tied to the superconducting order parameter, ju

44. APR

26

Wednesday

YITP/HET Joint Seminar

"TBA"

Presented by John Donoghue, U. Mass Amherst

2 pm, YITP Seminar Room, Stony Brook University

Wednesday, April 26, 2017, 2:00 pm

45. APR

27

Thursday

CFN Colloquium

"TBD"

Presented by Yugang Sun

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

Thursday, April 27, 2017, 4:00 pm

Hosted by: ''''Fang Lu''''

TBD

46. APR

28

Friday

Condensed-Matter Physics & Materials Science Seminar

"TBD"

Presented by Martin Mourigal, Georgia Tech

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

Friday, April 28, 2017, 1:30 pm

Hosted by: ''Igor Zaliznyak''

TBD

47. MAY

3

Wednesday

Joint YITP/HET Seminar

"TBA"

Presented by Tim Tait, UCI

2 pm, Small Seminar Room, Bldg. 510

Wednesday, May 3, 2017, 2:00 pm

Hosted by: 'Amarjit Soni'

48. MAY

11

Thursday

CFN Colloquium

"TBD"

Presented by TBD

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

Thursday, May 11, 2017, 4:00 pm

Hosted by: ''TBD''

49. MAY

11

Thursday

6:30 pm, Berkner Hall, Room B

Thursday, May 11, 2017, 6:30 pm

Hosted by: 'Nora Sundin'

50. MAY

17

Wednesday

HET/RIKEN Seminars

"TBA"

Presented by Jonathan Kozaczuk, UMass Amherst

2 pm, Small Seminar Room, Bldg. 510

Wednesday, May 17, 2017, 2:00 pm

Hosted by: 'Pier Paolo Giardino'

51. MAY

31

Wednesday

Office of Educational Programs Event

"Open Space Stewardship Program Celebration"

4 pm, Berkner Hall Auditorium

Wednesday, May 31, 2017, 4:00 pm

Hosted by: '''Melvyn Morris'''

52. JUN

1

Thursday

CFN Colloquium

"TBD"

Presented by Kyoung-Shin Choi

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

Thursday, June 1, 2017, 4:00 pm

Hosted by: '''''Mingzhao Lu'''''

53. JUN

5

Monday

Office of Educational Programs Event

"Summer "DOE/BNL" Internship Program Begins"

8:30 am, Berkner Hall Auditorium

Monday, June 5, 2017, 8:30 am

54. JUN

8

Thursday

6:30 pm, Berkner Hall, Room B

Thursday, June 8, 2017, 6:30 pm

Hosted by: 'Nora Sundin'

55. JUN

20

Tuesday

Annual Users' Meeting

"2017 RHIC/AGS Annual Users' Meeting"

8:30 am, Hamilton Seminar Room, Bldg. 555

Tuesday, June 20, 2017, 8:30 am

Hosted by: '''Kelly Guiffreda'''

56. JUN

21

Wednesday

Annual Users' Meeting

"2017 RHIC/AGS Annual Users' Meeting"

8:30 am, Large Seminar Room, Bldg. 510

Wednesday, June 21, 2017, 8:30 am

Hosted by: ''Kelly Guiffreda''

57. JUN

22

Thursday

Annual Users' Meeting

"2017 RHIC/AGS Annual Users' Meeting"

8:30 am, Berkner Hall Auditorium

Thursday, June 22, 2017, 8:30 am

Hosted by: 'Kelly Guiffreda'

58. JUN

23

Friday

Annual Users' Meeting

"2017 RHIC/AGS Annual Users' Meeting"

8:30 am, Large Seminar Room, Bldg. 510

Friday, June 23, 2017, 8:30 am

Hosted by: 'Kelly Guiffreda'

59. JUL

6

Thursday

CFN Colloquium

"TBD"

Presented by TBD

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

Thursday, July 6, 2017, 4:00 pm

Hosted by: 'TBD'

60. JUL

10

Monday

Office of Educational Programs Event

"High School Research Program Begins"

8:30 am, Hamilton Seminar Room, Bldg. 555

Monday, July 10, 2017, 8:30 am

61. AUG

10

Thursday

Office of Educational Programs Event

"2017 Summer Poster Symposium"

8:30 am, Berkner Hall Auditorium

Thursday, August 10, 2017, 8:30 am

62. AUG

28

Monday

Office of Educational Programs Event

"2017 Fall Internship Begins"

8:30 am, BLDG. 438

Monday, August 28, 2017, 8:30 am