General Information

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  • 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.


    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


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


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


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.  

Lattice Gauge Theory

Studies properties of hot and dense matter using lattice QCD methods.

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.


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.

Long Baseline Neutrino Experiment

An international collaboration working to precisely measure neutrino oscillations.


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.


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.


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


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


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. APR



    Physics Colloquium

    "Neutrinos and friends in the past and present universe"

    Presented by Alex Kusenko, UCLA

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

    Tuesday, April 21, 2015, 3:30 pm

    Hosted by: Morgan May

    Neutrinos play a role in various aspects of cosmology, including production of light elements, and the rate of expansion of the universe. Furthermore, the neutrino masses imply the likely existence of right-handed neutrinos, which can exist in the form of dark matter, and which can explain the matterantimatter asymmetry of the universe. I will discuss the many faces ordinary and hypothetical neutrinos in cosmology.

  2. MAY



    Physics Colloquium

    "Where Did Half the Starlight in the Universe Go"

    Presented by Mark Devlin, University of Pennsylvania

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

    Tuesday, May 12, 2015, 3:30 pm

    Hosted by: Peter Petreczky

    We believe that approximately half of all the light from stars is absorbed and reprocessed by dust. The resulting emission is grey body with a temperature near 30 Kelvin. The COBE satellite made the first measurements of the resulting Far Infrared Background (FIRB), but since that time, we have been unable to resolve the background into individual galaxies. The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) was designed to do this job. Its three bands at 250, 350, and 500 microns span the peak in emission for galaxies at z=1. I will discuss the BLAST experiment and present results from our measurements of resolved and unresolved galaxies. I will also discuss the implications for star formation in our own galaxy and how dust is changing the way we look at current and future searches for primordial gravity waves with the Cosmic Microwave Background.

  1. APR



    Nuclear Theory/RIKEN seminar

    "Heavy Hadrons under Extreme Conditions"

    Presented by Laura Tolos, Instituto de Ciencias del Espacio (IEEC-CSIC)

    2 pm, Small Seminar Room, Bldg. 510

    Friday, April 24, 2015, 2:00 pm

    Hosted by: Soeren Schlichting

    Hadrons under extreme conditions of density and temperature have captured the interest of particle and nuclear physicists as well as astrophysicists over the years in connection with an extensive variety of physical phenomena in the laboratory as well as in the interior of stellar objects, such as neutron stars. One of the physics goals is to understand the origin of hadron masses in the context of the spontaneous breaking of the chiral symmetry of Quantum Chromodynamics (QCD) at low energies in the non-perturbative regime and to analyze the change of the hadron masses due to partial restoration of this symmetry under extreme conditions. Lately other proper QCD symmetries have also become a matter of high interest, such as heavy-quark flavor and spin symmetries. These symmetries appear when the quark masses become larger than the typical confinement scale and they are crucial for characterizing hadrons with heavy degrees of freedom. In this talk I will address the properties of heavy hadrons under extreme conditions based on effective theories that incorporate the most appropriate scales and symmetries of QCD in each case. With the on-going and upcoming research facilities, the aim is to move from the light-quark to the heavy-quark sector and to face new challenges where heavy hadrons and new QCD symmetries will play a dominant role.

  2. MAY



    Nuclear Physics & RIKEN Theory Seminar


    Presented by Ivan Vitev, Los Alamos National Laboratory

    2 pm, Small Seminar Room, Bldg. 510

    Friday, May 1, 2015, 2:00 pm

    Hosted by: Soeren Schlichting

  1. APR



    Center for Data-Driven Discovery C3D

    "Computing Intensive Problems in Cosmology"

    Presented by Anze Slosar

    2 pm, John Dunn Seminar Room, Bldg. 463

    Tuesday, April 21, 2015, 2:00 pm

    Hosted by: Robert Harrison

    Cosmology is a branch of physics that studies the whole universe as a single physical system. Computing intensive methods are used throughout, both for data analysis and for theoretical modeling. The computational difficulties are in most cases due to existence of gravitational force which is important at all scales. This makes problems fundamentally different from problems in particle physics where each collision event can be considered to be statistically independent. In simulations, it is necessary to take into account the force contribution of any particle to any other and in data analysis the correlations between any two measurements. I will overview problems, solutions and current limitations. Time permitting, I will describe more technical aspects of the code we are developing to analyze data from the spectroscopic datasets.

  2. APR



    Particle Physics Seminar

    "Implications of Cosmological Observations for History of Early Universe"

    Presented by Ghazal Geshnizjani, University of Waterloo/ Perimeter Institute for Theoretical Physics

    3 pm, Small Seminar Room, Bldg. 510

    Wednesday, April 22, 2015, 3:00 pm

    Hosted by: Morgan May

    I will argue that any theory of early universe that matches cosmological observations should include a phase of accelerated expansion (i.e. inflation) or it has to break at least one of the following tenets of classical general relativity: Null Energy Conditions (NEC), sub-luminal signal propagation, or sub-Planckian energy densities. This proof extends to a large class of theories with higher (spatial) derivative or non-local terms in the action as well. Interestingly, only theories in the neighbourhood of Lifshitz points with ω ∝ k^0 and k^3 are excluded from the proof. I will also discuss in what sense detecting primordial gravitational waves is a smoking gun for inflation.

  3. APR



    Particle Physics Seminar

    "(Real) Early Universe Cosmology with Quark Gluon Plasma"

    Presented by Niayesh Afshordi, Perimeter Institute for Theoretical Physics

    3 pm, Small Seminar Room, Bldg. 510

    Thursday, April 23, 2015, 3:00 pm

    Hosted by: Morgan May

    An intriguing possibility that can address pathologies in both early universe cosmology (i.e. the horizon problem) and quantum gravity (i.e. non-renormalizability), is that particles at very high energies and/or temperatures could propagate arbitrarily fast. In this talk, I introduce Thermal Tachyacoustic Cosmology (TTC), i.e. this scenario with thermal initial conditions. We find that a phase transition in the early universe, around the scale of Grand Unified Theories (GUT scale; T∼10^{15} GeV), during which the speed of sound drops by several orders of magnitude within a Hubble time, can fit current CMB observations. However, I will then argue that cosmological bounds on the density of primordial black holes suggest that Lorentz invariance in the primordial thermal plasma may not recover until much lower temperatures, close to the QCD phase transition. This presents the exciting possibility of testing this scenario in the thermal plasma produced in relativistic heavy ion collisions.

  4. MAY



    Particle Physics Seminar

    "LHCb Run I Results and Run II Prospects"

    Presented by Philip Ilten, Massachusetts Institute of Technology

    3 pm, Small Seminar Room, Bldg. 510

    Thursday, May 28, 2015, 3:00 pm

    Hosted by: Ketevi A. Assamagan

    The LHCb detector is a forward arm spectrometer on the Large Hadron Collider, designed for the study of particles containing b or c quarks. A variety of recent results from the Run I dataset, taken from 2010 - 2013, will be presented, emphasizing the scope of the LHCb physics program. These areas include central exlusive production of quarkonia, exotic particle searches, precision electroweak cross-sections, CKM measurements, and more. Prospects for Run II measurements will be outlined.