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Seminars

  1. MAR

    30

    Thursday

    RIKEN Lunch Seminar

    "The hadronic light-by-light contribution to muon g-2 from lattice QCD"

    Presented by Luchang Jin, BNL

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

    Thursday, March 30, 2017, 12:30 pm

    Hosted by: 'Enrico Rinaldi'

    The current measurement of muonic g-2 disagrees with the theoretical calculation by about 3 standard deviations. Hadronic vacuum polarization (HVP) and hadronic light by light (HLbL) are the two types of processes that contribute most to the theoretical uncertainty. The current value for HLbL is still given by models. We report our latest lattice calculation of hadronic light-by-light contribution to muon g-2 using our recent developed moment method. The connected diagrams and the leading disconnected diagrams are included. The calculation is performed on a 48^3 × 96 lattice with physical pion mass and 5.5 fm box size. We expect sizable finite volume and finite lattice spacing corrections to the results of these calculations which will be estimated in calculations to be carried out over the next 1-2 years.

  2. APR

    4

    Tuesday

    Nuclear Physics Seminar

    "New insights to the search for the anomalous chiral effects using small colliding system at the LHC"

    Presented by Zhoudunming Tu, Rice University

    11 am, Small Seminar Room, Bldg. 510

    Tuesday, April 4, 2017, 11:00 am

    Hosted by: 'Jiangyong Jia'

    In relativistic heavy ion collisions, anomalous chiral effects have been predicted to occur in presence of a strong magnetic field induced by the spectator protons, e.g., the chiral magnetic effect (CME) and chiral magnetic wave (CMW). In the past decade, measurements of CME and CMW have been attempted from RHIC to the LHC energies, where significant signals were found to be in line with expectations of the chiral effects. However, soon after the initial excitement, various sources of background effects were identified and proposed to qualitatively describe the data. The origin of the backgrounds has been extensively studied, but still remains inconclusive to date. Recently, novel collective phenomenon has been found in high-multiplicity pA collisions, similar to those in AA collisions. Due to the weak correlation between the magnetic field direction and the event plane, the high-multiplicity pPb data are expected to have much suppressed CME and CMW signal, comparing to that in PbPb collisions, and thus provide an ideal testing ground to observables related to the anomalous chiral effects. In this talk, I will present new measurements related to the CME and CMW from CMS in pPb and PbPb collisions at the LHC, and discuss their implications to the search for the anomalous chiral effects including an outlook for future studies.

  3. APR

    7

    Friday

    Nuclear Theory/RIKEN Seminar

    "Anisotropic dissipative fluid dynamics - foundations & applications in heavy-ion physics"

    Presented by Johann Wolfgang, Goethe-Universität

    2 pm, Small Seminar Room, Bldg. 510

    Friday, April 7, 2017, 2:00 pm

    Hosted by: 'Heikki Mantysaari'

    In collisions of heavy ions at ultrarelativistic energies, a system of hot and dense strongly interacting matter is created. This matter exhibits a surprisingly strong degree of collectivity, implying a short mean free path of its constituents and, consequently, a small shear viscosity-to-entropy density ratio. This allows to describe the evolution of the system using relativistic dissipative fluid dynamics. Dissipative fluid dynamics can be understood as an expansion around local thermodynamical equilibrium, corresponding to the ideal-fluid limit where dissipative corrections are absent. A short mean free path means that this expansion is well defined and converges sufficiently rapidly. Nevertheless, in the initial stage of a heavy-ion collision, space-time gradients of the fluid-dynamical fields (energy-momentum and net-charge densities) are so large that dissipative corrections to the ideal-fluid limit can become sizable. In this situation, novel approaches to relativistic dissipative fluid dynamics are called for. One such approach is anisotropic dissipative fluid dynamics, which is based on an expansion around an anisotropic non-equilibrium state (instead of local thermodynamical equilibrium, as in conventional dissipative fluid dynamics). In this talk, I present a derivation of the equations of motion of anisotropic dissipative fluid dynamics from the Boltzmann equation, using the method of moments. I also discuss how to resolve an ambiguity to close the system of equations of motion in the case when there are no corrections to the anisotropic state which constitutes the basis of the moment expansion.

  4. APR

    14

    Friday

    Nuclear Theory/RIKEN Seminar

    "Effect of magnetic field on flow fluctuations in"

    Presented by Ajit M. Srivvastava

    2 pm, Small Seminar Room, Bldg. 510

    Friday, April 14, 2017, 2:00 pm

    Hosted by: 'Heikki Mantysaari'

    Very strong magnetic fields can arise in non-central heavy-ion collisions at ultrarelativistic energies, which may not decay quickly in a conducting plasma. We carry out magnetohydrodynamics simulations to study the effects of this magnetic field on the evolution of the plasma and on resulting flow fluctuations. Our results show that magnetic field leads to enhancement in elliptic flow, while flow fluctuations lead to reorganization of magnetic flux resulting in a transient increase in the local magnetic field. We also show generation of vorticity arising from nontrivial dependence of magnetosonic waves on pressure gradients and magnetic field direction. Magnetic field from collision of deformed nuclei shows very nontrivial features and can lead to qualitatively new effects on plasma evolutions. We discuss possibility of dynamo effect in the presence of vortices if any exotic high baryon density QCD phases are achieved in heavy-ion collisions.

  5. APR

    27

    Thursday

    RIKEN Lunch Seminar

    "Probing quantum entanglement at the Electron Ion Collider"

    Presented by Dima Kharzeev, BNL and Stony Brook University

    12:30 pm, Building 510, Room 20160

    Thursday, April 27, 2017, 12:30 pm

    Hosted by: 'Hiromichi Nishimura'

  6. MAY

    11

    Thursday

    RIKEN Lunch Seminar

    "> Probing quantum entanglement at the Electron Ion Collider"

    Presented by Dima Kharzeev, BNL and Stony Brook University

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

    Thursday, May 11, 2017, 12:30 pm

    Hosted by: 'Hiromichi Nishimura'

  7. 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'

  1. Nuclear Physics Seminar

    "High-pt Hadron Production in Au+Au and d+Au Collisions at sqrt (s) = 200 GeV"

    Presented by Sasha Milov, Stony Brook University

    Tuesday, July 1, 2003, 11 am
    Small Seminar Room, Bldg. 510

  2. Nuclear Physics Seminar

    "Production of Lambda (1520) at RHIC at sqrt (s) = 200 GeV"

    Presented by Ludovic Gaudichet, Subatech, France

    Tuesday, July 15, 2003, 11 am
    Small Seminar Room, Bldg. 510

  3. Nuclear Physics Seminar

    "Induced Criticality of Non-Order Parameter Fields"

    Presented by Agnes Mocsy, Niels Bohr Institute, Denmark

    Tuesday, July 22, 2003, 11 am
    Small Seminar Room, Bldg. 510

  4. Nuclear Physics Seminar

    "Strangeness Production in Au+Au Collisions at RHIC"

    Presented by Ben Norman, Kent State University

    Tuesday, July 29, 2003, 11 am
    Small Seminar Room, Bldg. 510

  5. Nuclear Physics & RIKEN Theory Seminar

    "Hydrodynamic Afterburner for Color Glass Condensate"

    Presented by Yasushi Nara, University of Arizona

    Friday, August 8, 2003, 2 pm
    Small Seminar Room, Bldg. 510

  6. High-Energy Physics & RIKEN Theory Seminar

    "Strong Interaction Effect on Muon g-2"

    Presented by Masashi Hayakawa, RIKEN/BNL Research Center

    Sunday, August 10, 2003, 1:30 pm
    Small Seminar Room, Bldg. 510

  7. High-Energy Physics & RIKEN Theory Seminar

    "Elitzurs Theorem and the Sign Problem"

    Presented by Kim Splittorff, Stony Brook University

    Wednesday, August 13, 2003, 1:30 pm
    Small Seminar Room, Bldg. 510

  8. Instrumentation Division Seminar

    "Development of Novel Silicon Stripixel Detectors for High energy and Nuclear Physics Experiments"

    Presented by Zheng Li, Instrumentation Division

    Wednesday, September 10, 2003, 2:30 pm
    Large Seminar Room, Bldg. 535

  9. Nuclear Physics Seminar

    "Discovery of Penta Quarks"

    Presented by Prof. Ken-chi Imai, Kyoto University, Japan

    Tuesday, October 14, 2003, 11 am
    Small Seminar Room, Bldg. 510

  10. RIKEN BNL Research Center Workshop

    "Collective Flow and QGP Properties"

    Monday, November 17, 2003, 9 am
    Large Seminar Room, Bldg. 510