Fluctuating Glasma initial conditions and flow in heavy ion collisions

Feb, 2012
5 pages
Published in:
  • Phys.Rev.Lett. 108 (2012) 252301
e-Print:

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Abstract: (arXiv)
We compute initial conditions in heavy-ion collisions within the Color Glass Condensate (CGC) framework by combining the impact parameter dependent saturation model (IP-Sat) with the classical Yang-Mills description of initial Glasma fields. In addition to fluctuations of nucleon positions, this IP-Glasma description includes quantum fluctuations of color charges on the length-scale determined by the inverse nuclear saturation scale Q_s. The model naturally produces initial energy fluctuations that are described by a negative binomial distribution. The ratio of triangularity to eccentricity is close to that in a model tuned to reproduce experimental flow data. We compare transverse momentum spectra and v_(2,3,4)(p_T) of pions from different models of initial conditions using relativistic viscous hydrodynamic evolution.
Note:
  • 5 pages, 4 figures, version published in PRL
  • 12.38.Mh
  • 25.75.Gz
  • 25.75.Ld
  • 25.75.-q
  • heavy ion: scattering
  • boundary condition
  • transverse momentum: momentum spectrum
  • impact parameter: dependence
  • hydrodynamics: viscosity
  • saturation
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