• Brookhaven physicists are using detectors at the Relativistic Heavy Ion Collider to explore how the matter that makes up atomic nuclei behaved just after the Big Bang.

• Brookhaven physicists and engineers are collaborators in the ATLAS experiment at CERN's Large Hadron Collider.

• LBNE and the Daya Bay Neutrino Experiments seek to understand the subtle oscillations of neutrinos, ghost-like particles formed in the heart of stars

• In the LSST and BOSS experiments, Brookhaven physicists seek to measure and constrain the properties of dark matter, dark energy and the standard cosmological model.

### Nuclear Physics

#### PHENIX

Responsibile for the operation and  physics exploitation of the PHENIX experiment at RHIC.

#### STAR

Responsibile for the operation and  physics exploitation of the STAR experiment at RHIC.

#### RHIC Spin

Leads, supports, and provides for the common requirements of the RHIC spin program, particularly for polarimetry.

#### RIKEN BNL Research Center

Conducts quantum chromodynamics and proton spin structure research.

#### Nuclear Theory

Conducts research to understand many body aspects of QCD, including the properties of hot and dense matter as well high gluon density matter.

#### RHIC Computing Facility

Provides computing services for experiments at RHIC, and the Large Synoptic Survey Telescope project.

### High-Energy Physics

#### Cosmology & Astrophysics

Solving problems in observational cosmology: how to measure and constrain properties of dark matter, dark energy and the standard cosmological model.

#### Electronic Detector

Studies very rare processes at the Intensity Frontier.

#### Omega

Group members are collaborators on the LHC ATLAS experiment.

#### Physics Application

Develops physics applications software for the LHC ATLAS experiment.

#### High-Energy Theory

Focuses on providing theoretical foundation for the search for physics beyond the standard model, including lattice QCD calculations of key quantities required for this quest.

#### ATLAS Computing Facility

Provides computing services for U.S. ATLAS.

### High-Energy Physics

#### Baryonic Oscillation Spectroscopic Survey

BOSS studies dark energy—the force thought to be responsible for the universe’s accelerating expansion.

#### Dark Energy Survey

Seeks to probe the origin of the accelerating universe and uncover the nature of dark energy by measuring the 14-billion-year history of cosmic expansion.

#### Large Synoptic Survey Telescope

A 3.2 gigapixel camera mounted in a  ground-based telescope designed to produce the widest, densest, and most complete images of our universe ever captured.

#### Deep Underground Neutrino Experiment

An international collaboration working to precisely measure neutrino oscillations.

#### ATLAS

An experiment at CERN's Large Hadron Collider designed to detect particles created by proton-proton collisions.

#### Daya Bay Neutrino Experiment

An international collaboration studying the subtle transformations of neutrinos.

#### MicroBooNE

Measures low energy neutrino cross sections and investigates low energy excess events observed by the MiniBooNE experiment.

#### Muon g-2

A high precision measurement of the muon's g-2 value. A deviation between theory and observed value will suggest the existence of new particles.

#### Mu2e

Experiment which directly probes the Intensity Frontier and aids research on the Energy and Cosmic frontiers with precision measurements to characterize properties of new particles.

### Nuclear Physics

#### PHENIX

An experiment at the Relativistic Heavy Ion Collider designed to explore quark gluon plasma.

#### STAR

An experiment at the Relativistic Heavy Ion Collider designed to explore quark gluon plasma.

#### Electron Ion Collider (Future)

Plans for the world's first electron-nucleus collider, also known as eRHIC, call for the addition of a 5 to 10 GeV electron ring inside the RHIC tunnel.

The Physics Department is part of Brookhaven's Nuclear & Particle Physics Directorate.

### Seminars & Colloquia

1. FEB

14

Tuesday

Physics Colloquium

"TBA"

Presented by Aleksi Kurkela, CERN and Univ. of Stavenger

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

Tuesday, February 14, 2017, 3:30 pm

Hosted by: 'Robert Pisarski'

2. 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'

3. 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'

4. 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'

1. JAN

20

Friday

Nuclear Theory Seminar

"Helicity Evolution at Small x and the Proton Spin"

Presented by Yuri Kovchegov, Ohio State University

2 pm, Small Seminar Room, Bldg. 510

Friday, January 20, 2017, 2:00 pm

Hosted by: ''Heikki Mantysaari''

We construct small-x evolution equations which can be used to calculate quark and anti-quark helicity TMDs and PDFs, along with the g_1 structure function. These evolution equations resum powers of alpha_s ln^2 (1/x) in the polarization-dependent evolution along with the powers of alpha_s ln (1/x) in the unpolarized evolution which includes saturation effects. The equations are written in an operator form in terms of polarization-dependent Wilson line-like operators. While the equations do not close in general, they become closed and self-contained systems of non-linear equations in the large-N_c and large-N_c & N_f limits. After solving the large-N_c equations numerically we obtain the following small-x asymptotics for the flavor-singlet g_1 structure function along with quarks helicity PDFs and TMDs (in absence of saturation effects): g_1^S (x, Q^2) ~ \Delta q^S (x, Q^2) ~ g_{1L}^S (x, k_T^2) ~ ( 1/x )^{alpha_h} \approx t( 1/x )^{2.31 \sqrt{\alpha_s N_c/(2pi}} This result is valid for all flavors. We also give an estimate of how much of the proton's spin may reside at small x and what impact this has on the so-called spin crisis.'' This work would help one better understand longitudinal polarization data to be obtained at the proposed Electron-Ion Collider (EIC).

2. FEB

16

Thursday

Nuclear Theory/RIKEN Seminar

"TBA"

Presented by Bowen Xiao, CCNU

2 pm, Small Seminar Room, Bldg. 510

Thursday, February 16, 2017, 2:00 pm

Hosted by: 'Heikki Mantysaari'

3. 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'

1. JAN

18

Today

Particle Physics Seminar - SB/BNL Joint Cosmo Seminar

"Hunting down systematics in modern galaxy surveys"

1:30 pm, Stony Brook University

Wednesday, January 18, 2017, 1:30 pm

With the next generation of wide field galaxy surveys, both spectroscopic and photometric, we expect to achieve unprecedented constraints on the expansion history of the universe and the growth of structure. Maximizing the flow of information from these rich datasets to constraints on our physical models requires accurate characterization of systematic uncertainties. First, we present a method for estimation of covariance matrices of galaxy clustering measurements with spectroscopic surveys. We show that our method enables us to generate accurate galaxy mocks needed for BAO and RSD analyses on nonlinear scales. Then, we present the main challenges in extracting cosmological information from lensing measurements of deep imaging surveys. We show that employing novel techniques in estimation of the point spread function can keep this major systematic under control. Finally, we discuss various approaches for improvement of the photometric redshifts for the imaging surveys. We demonstrate how the precision and accuracy of photometric redshifts can be greatly enhanced if we take advantage of combining different datasets.

2. JAN

19

Thursday

Particle Physics Seminar

"Ultra-Fast Silicon Detector for precise timing at CMS"

Presented by Nicolo' Cartiglia, Torino

11 am, Small Seminar Room, Bldg. 510

Thursday, January 19, 2017, 11:00 am

Hosted by: 'Alessandro Tricoli'

In this seminar I will first review the physics case for a hermetic timing detector for charge particles to be installed in CMS in the years 2024-25 in preparation of the High Luminosity upgrade of the LHC accelerator (HL-LHC). Then I will present the possible technologies currently under studies for the timing detector and then I will concentrate on explaining the basics principles of Ultra-fast Silicon Detectors and their performances. I will conclude with a brief outline of the future R&D steps for the construction of the timing detector.

3. JAN

19

Thursday

Center for Functional Nanomaterials Seminar

"Amyloid Self-Assembly and Sequence-Dependent Interactions with Plasmonic Nanoparticles"

Presented by Shih-Ting (Christine) Wang, Imperial College London, United Kingdom

2 pm, CFN, Bldg 735, Conference Room A, 1st Floor

Thursday, January 19, 2017, 2:00 pm

Hosted by: ''Oleg Gang''

Nanoparticles (NPs) have been used to inhibit or modulate the peptide fibrillation as a potential therapeutic strategy and to understand the molecular mechanisms of amyloid diseases. Particularly, gold nanoparticles (AuNPs) have been widely used to study peptide/inorganic NP interactions due to the tunable size, surface and plamonic properties. In this talk, I will present the study of interaction of AuNPs with islet amyloid polypeptide (IAPP), which features in type 2 diabetes pathogenesis by self-assembly into fibrils and peptide-induced disruption of cell membranes. Amyloid fibrils share a distinct β-sheet structure, with the structural diversity controlled by the amino acid sequence. To elucidate the key mechanisms of amyloid self-assembly and provide unique viewpoints on the interactions with NPs, polymorphic fibril structures will firstly be discussed using amyloidogenic peptides that are designed based on the IAPP sequence. The observed amyloid fibrillation and hydrogelation controlled by the peptide structure also led to a proposed relationship between amyloid structure and self-assembly behaviour. Next, I will present the systematic study of IAPP/AuNP interactions, in which the strong binding is initiated by the metal-binding sequence in the hydrophilic peptide domain. Structural transition accelerated in a NP size-dependent manner also implies a facet-dependent IAPP/AuNP interaction. Based on these findings, liquid cell transmission electron microscopy was used for direct visualisation of the dynamic growth of AuNPs in presence of IAPP fibrils. The results show growth of branch(star)-shaped AuNPs in the presence of IAPP fibrils, suggesting a preferred nucleation site for Au binding and subsequent growth on the amyloid template.

4. FEB

1

Wednesday

Particle Physics Seminar - SB/BNL Joint Cosmo Seminar

"TBA"

Presented by Elisabeth Krause, SLAC

1:30 pm, Stony Brook University

Wednesday, February 1, 2017, 1:30 pm

5. FEB

8

Wednesday

Particle Physics Seminar - SB/BNL Joint Cosmo Seminar

"TBA"

Presented by Tim Eifler, JPL/Caltech

1:30 pm, Stony Brook University

Wednesday, February 8, 2017, 1:30 pm

6. FEB

15

Wednesday

Particle Physics Seminar - SB/BNL Joint Cosmo Seminar

"TBA"

1:30 pm, Stony Brook University

Wednesday, February 15, 2017, 1:30 pm

7. 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'

8. 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

9. 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