BNL Home
  • RHIC

    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.

  • ATLAS

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

  • Neutrinos

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

  • Cosmology

    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

The nuclear theory group conducts research in all areas of QCD, including structure of hadrons and nuclei at high energies, the QCD phase diagram and the properties of quark-gluon 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. No events scheduled

  1. AUG

    17

    Friday

    Nuclear Theory/RBRC Seminar

    "Computation of the shear viscosity in QCD at (almost) next to leading order"

    Presented by Derek Teaney, Stony Brook University

    2 pm, Building 510, Room 2-38

    Friday, August 17, 2018, 2:00 pm

  2. AUG

    28

    Tuesday

    Nuclear Physics Seminar

    "Probe strong magnetic field in QGP with dielectrons from photon-photon interactions"

    Presented by Zhangbu Xu, BNL

    11 am, Small Seminar Room, Bldg. 510

    Tuesday, August 28, 2018, 11:00 am

    Hosted by: Rongrong Ma

    We presents first measurements of $e^+e^-$ pair production from light-light scattering in non-central heavy ion collisions. The excess yields peak distinctly at low transverse momentum with sqrt() between 40 to 60 MeV/c. The excess yields can be explained only when the photon-photon interactions are included in model calculations. However, the measured pT^2 distributions are significantly broader than model calculation and are different between Au+Au and U+U. Our measurements provide a possible experimental evidence of the existence of strong electromagnetic field. And I will discuss its possible impact on emerging phenomena in hadronic heavy-ion collisions, such as Chiral Magnetic Effect.

  3. AUG

    30

    Thursday

    Special Nuclear Theory/RIKEN Lunch Seminar

    "Signal-to-noise issues in non-relativistic quantum matter: from entanglement to thermodynamics"

    Presented by Joaquin Drut, University of North Carolina

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

    Thursday, August 30, 2018, 12:30 pm

    Hosted by: Rob Pisarski

    Non-relativistic quantum matter, as realized in ultracold atomic gases, continues to be a remarkably versatile playground for many-body physics. Experimentalists have exquisite control over temperature, density, coupling, and shape of the trapping potential. Additionally, a wide range of properties can be measured: from simple ones like equations of state to more involved ones like the bulk viscosity and entanglement. The latter has received much attention due to its connection to quantum phase transitions, but it has proven extremely difficult to compute: stochastic methods display exponential signal-to-noise issues of a very similar nature as those due to the infamous sign problem affecting finite-density QCD. In this talk, I will present an algorithm that solves the signal-to-noise issue for entanglement, and I will show results for strongly interacting systems in three spatial dimensions that are the first of their kind. I will also present a few recent explorations of the thermodynamics of polarized matter and other cases that usually have a sign problem, using complexified stochastic quantization.

  4. SEP

    4

    Tuesday

    Nuclear Physics Seminar

    "Neutron production and capture in stellar nucleosynthesis:^{22}Ne(\Alpha,n)^{25}Mg reaction and radiative neutron captures of radioactive nuclei"

    Presented by Shuya Ota, Texas A&M University

    11 am, Small Seminar Room, Bldg. 510

    Tuesday, September 4, 2018, 11:00 am

    Hosted by: Jin Huang

    Most of elements heavier than Fe in the Universe are produced by a series of neutron capture reaction and ??-decay in stars. The s-process, which occurs under moderate neutron environments (~107-10 neutrons/cm3) such as in He burning of massive stars, is responsible for producing almost half of the heavy elements. Neutrons for the s-process environment is believed to be supplied by two dominant reactions, one of which is 22Ne(?,n)25Mg reaction. This reaction in massive stars is dominated by a few resonance reactions. Nevertheless, there remain large uncertainties about contribution of the reaction to the s-process nucleosynthesis because the reaction cross sections are too small for direct measurements due to Coulomb barrier (E? = 400-900 keV in the lab system). In the first half of this seminar, I will present our experiment to determine these resonance strengths with a cyclotron accelerator at Texas A&M University. The experiment was performed by an indirect approach using 6Li(22Ne,25Mg+n)d ?-transfer reaction, in which resonance properties such as neutron decay branching ratios of produced 26Mg were studied by measuring deuterons, ?-ray, and 26Mg in coincidence using large arrays of Si and Ge, and a magnetic spectrometer. Our results showed neutron production from 22Ne(?,n)25Mg reaction can be about 10 times lower than past measurements. The effect of our measurements on the s-process nucleosynthesis will be discussed. In the second half of this seminar, I will present our experiments to determine neutron capture cross sections of radioactive nuclei using the Surrogate Reaction method [1]. Neutron capture reactions for the s-process involve relatively long-lived nuclei neighboring stability in the nuclear chart. Therefore, the Surrogate Reaction, which creates the same compound nuclei as the neutron capture reaction using a stable beam and target, can be a useful approach. On the other hand, the r- process, which produces the other half

  5. SEP

    7

    Friday

    Nuclear Theory/RBRC Seminar

    "TBA"

    Presented by Ivan Horvath, University of Kentucky

    2 pm, Building 510, CFNS Seminar room 2-38

    Friday, September 7, 2018, 2:00 pm

    Hosted by: Rob Pisarski

  6. SEP

    28

    Friday

    Nuclear Theory/RIKEN Seminar

    "TBA"

    Presented by Jordy De Vries, UMass Amherst

    2 pm, Building 510, CFNS Seminar Room 2-38

    Friday, September 28, 2018, 2:00 pm

    Hosted by: Chun Shen

  7. OCT

    19

    Friday

    Nuclear Theory/RIKEN Seminar

    "TBA"

    Presented by Aleksas Mazeliauskas, University of Heidelberg

    2 pm, Building 510, CFNS Seminar Room 2-38

    Friday, October 19, 2018, 2:00 pm

    Hosted by: Chun Shen

  8. NOV

    2

    Friday

    Nuclear Theory/RBRC Seminar

    "TBA"

    Presented by Al Mueller, Columbia University

    2 pm, Building 510, Room 2-38

    Friday, November 2, 2018, 2:00 pm

    Hosted by: Andrey Tarasov

  1. SEP

    5

    Wednesday

    Special Particle Phyics Seminar

    "LHCb"

    Presented by Angelo Di Canto, CERN

    10:30 am, Small Seminar Room, Bldg. 510

    Wednesday, September 5, 2018, 10:30 am

    Hosted by: Chao Zhang

  2. SEP

    13

    Thursday

    Particle Physics Seminar

    "Higgs couplings"

    Presented by Konstantinos Nikolopoulos

    3 pm, Small Seminar Room, Bldg. 510

    Thursday, September 13, 2018, 3:00 pm

    Hosted by: Alessandro Tricoli

  3. SEP

    17

    Monday

    Special Particle Physics Seminar

    "LHCb"

    Presented by Markus Roehrken, CERN

    1 pm, Small Seminar Room, Bldg. 510

    Monday, September 17, 2018, 1:00 pm

    Hosted by: Chao Zhang

  4. OCT

    1

    Monday

    Particle Physics Seminar

    "Results from NA62 and its future program"

    Presented by Babette Döbrich, CERN

    3 pm, Small Seminar Room, Bldg. 510

    Monday, October 1, 2018, 3:00 pm

    Hosted by: Alessandro Tricoli

    The decay K+→π+νν, with a very precisely predicted branching ratio of less than 10^{-10}, is one of the best candidates to reveal indirect effects of new physics at the highest mass scales. The NA62 experiment at CERN SPS is designed to measure the branching ratio of the K+→π+νν with a decay-in-flight technique, novel for this channel. NA62 took data in 2016, 2017 and another year run is scheduled in 2018. Statistics collected in 2016 allows NA62 to reach the Standard Model sensitivity for K+→π+νν, entering the domain of 10-10 single event sensitivity and showing the proof of principle of the experiment. The analysis data is reviewed and the preliminary result from the 2016 data set presented. In addition, owing to the high beam-energy and a hermetic detector coverage, NA62 also has the opportunity to directly search for a plaethora of long-lived beyond-the Standard Model particles, such as Axion-like Particles and Dark Photons. We will review the status and results of this searches and give prospects for future data taking at NA62.

  5. OCT

    11

    Thursday

    Particle Physics Seminar

    "Higgs to beauty quarks"

    Presented by Caterina Vernieri, SLAC

    3 pm, Small Seminar Room, Bldg. 510

    Thursday, October 11, 2018, 3:00 pm

    Hosted by: Alessandro Tricoli

    The Higgs boson discovery at the LHC marked a historic milestone in the study of fundamental particles and their interactions. Over the last six years, we have begun measuring its properties, which are essential to build a deep understanding of the Higgs sector of the Standard Model and to potentially uncover new phenomena. The Higgs' favored decay mode to beauty (b) quarks (~60%) had so far remained elusive because of the overwhelming background of b-quark production due to strong interactions. Observing the Higgs decay to b-quarks was one of the critical missing pieces of our knowledge of the Higgs sector. Measuring this decay is a fundamental step to confirm the mass generation for fermions and may also provide hints of physics beyond the Standard Model. The CMS observation of the decay of the SM Higgs boson into a pair of b-quarks exploiting an exclusive production mode (VH) is yet another major milestone. This experimental achievement at the LHC, considered nearly impossible in the past, makes use of several advanced machine learning techniques to identify the b-quark distinctive signature, improve the Higgs boson mass resolution, and discriminate the Higgs boson signal from background processes.

  6. OCT

    11

    Thursday

    NSLS-II Colloquium Series

    "Biophysical Studies of an RNA Virus particle and its Maturation: Insights into an Elegantly Programmed Nano-machine"

    Presented by John E. (Jack) Johnson, Department of Integrative Structural and Computational Biology, The Scripps Research Institute

    4 pm, Large Seminar Room, Bldg. 510

    Thursday, October 11, 2018, 4:00 pm

    Hosted by: John Hill

    Nudaurelia Capensis ? Virus (N?V) is a eukaryotic, quasi-equivalent, RNA virus, with a T=4 surface lattice, where maturation is dramatic (a change in particle size of 100Å) and is novel in that it can be investigated in vitro. Here we use X-ray crystallography, biochemistry, Small Angle X-ray Scattering, and electron cryo-microscopy and image reconstruction (CryoEM), to characterize maturation intermediates, an associated auto-catalytic cleavage, the kinetics of morphological change and to demonstrate that regions of N?V subunit folding are maturation-dependent and occur at rates determined by their quasi-equivalent position in the capsid. Matsui, T., Lander, G. C., Khayat, R., and Johnson, J. E. 2010. Subunits fold at position-dependent rates during maturation of a eukaryotic RNA virus. Proc Natl Acad Sci U S A 107:14111-5. Veesler, D., and Johnson, J.E. 2012. Virus Maturation. Annual review of biophysics 41:473-496. Doerschuk, P. C., Gong, Y., Xu, N., Domitrovic, T., and Johnson, J. E. 2016. Virus particle dynamics derived from CryoEM studies. Curr Opin Virol 18:57-63.

  7. OCT

    18

    Thursday

    Particle Physics Seminar

    "ATLAS Di-boson resonance searches"

    Presented by Viviana Cavaliere, Brookhaven National Lab

    3 pm, Small Seminar Room, Bldg. 510

    Thursday, October 18, 2018, 3:00 pm

    Hosted by: Alessandro Tricoli

  8. NOV

    1

    Thursday

    Particle Physics Seminar

    "Search of the rare decay of KL→π0νν at J-PARC"

    Presented by Yu-Chen, Tung

    3 pm, Small Seminar Room, Bldg. 510

    Thursday, November 1, 2018, 3:00 pm

    Hosted by: Chao Zhang

    J-PARC KOTO is a dedicated experiment to search for the rare KL→π0νν decay. This decay is special not only because of its direct CP violating process, but also its theoretical cleanness. In the standard model, the branching ratio of KL→π0νν is calculated to be 3×10-11 with only a few percent uncertainty, which provides a clean base to explore new physics through finding deviations from the standard model. In the recently released results of data collected in 2015, the sensitivity of search was improved by an order of magnitude from the previous result and no event was observed in the signal region, with the prediction of 0.4 background event. In this talk, I will report the analysis and DAQ plan toward the sensitivity of O(-11).

  9. DEC

    6

    Thursday

    Particle Physics Seminar

    "W mass and Weinberg angle measurments at ATLAS"

    Presented by Matthias Schott

    3 pm, Small Seminar Room, Bldg. 510

    Thursday, December 6, 2018, 3:00 pm

    Hosted by: Alessandro Tricoli