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RIKEN Nishina Center for Accelerator-Based Science Theory Group

Group Leader: Yoshitaka Hatta (Ph.D.)

Research Summary

Yoshitaka Hatta (Ph.D.)

RIKEN BNL Research Center has been founded in April 1997 at Brookhaven National Laboratory in the U.S. The center is dedicated to the physics of the Relativistic Heavy-Ion Collider (RHIC), such as spin physics, lattice QCD and Quark-Gluon Plasma (QGP). The theory group conducts world-leading research on the frontiers in RHIC physics. Our main interests include the spin structure of the proton, single-spin asymmetries, the hydrodynamic evolution of the QGP, the QCD phase diagram, jet quenching and the gluon saturation at small-x.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Physics
  • Elementary particle physics
  • nuclear physics


  • Quantum Chromodynamics (QCD)
  • Quark-gluon plasma
  • Proton spin structure
  • QCD phase diagram

Selected Publications

  • 1. G. Policastro,, D.T. Son, A.O. Starinets.:
    "The Shear viscosity of strongly coupled N=4 supersymmetric Yang-Mills plasma"
    Phys. Rev. Lett. 87, 081601 (2001)
  • 2. R.J. Fries, Berndt Muller, C. Nonaka, S.A. Bass.:
    "Hadronization in heavy ion collisions: Recombination and fragmentation of partons"
    Phys. Rev. Lett. 90, 202303 (2003)
  • 3. A. Bazavov et al.:
    "Equation of state and QCD transition at finite temperature"
    Phys. Rev. D80, 014504 (2009)
  • 4. D. E. Kharzeev, L. D. McLerran, H. J. Warringa.:
    "The Effects of topological charge change in heavy ion collisions: 'Event by event P and CP violation'"
    Nucl. Phys. A803, 227-253 (2008)
  • 5. Y. Hatta, M. Stephanov.:
    "Proton number fluctuations as a signal of the QCD critical point"
    Phys. Rev. Lett. 91, 102003 (2003)
  • 6. X. Ji, J.W. Qiu, W. Vogelsang, F. Yuan.:
    "Transverse spin asymmetry in semi-inclusive deep inelastic scattering"
    Phys. Lett. B638, 178 (2006)
  • 7. K. Fukushima, F. Gelis, L. McLerran.:
    "Initial Singularity of the Little Bang"
    Nucl.Phys.A786 107-130 (2007)
  • 8. P. Bedaque, T. Shafer.:
    "High density quark matter under stress"
    Nucl.Phys.A697, 802 (2002)
  • 9. A. Bzdak, V. Skokov.:
    "Event-by-event fluctuations of magnetic and electric fields in heavy-ion collisions"
    Phys. Lett. B710, 171 (2012)
  • 10. Y, Tanizaki, Y. Kikuchi.:
    "Vacuum structure of bifundamental gauge theories at finite topological angles"
    JHEP 06, 102 (2017)

Related Links

Lab Members

Principal investigator

Yoshitaka Hatta
Group Leader

Core members

Chun Shen
RBRC Researcher
Vladimir Skokov
RBRC Researcher
Yacine Mehtar-Tani
RBRC Researcher

Contact Information

Physics Department. Bldg 510A
RIKEN BNL Research Center, Brookhaven National Laboratory,
Upton, NY 11973
Tel: +1-631-344-3097
Fax: +1-631-344-4906
Email: pesposit [at] bnl.gov