Viscosities of gluon dominated QGP model within relativistic non-Abelian hydrodynamics

T. P. Djun, L. T. Handoko, Bambang Soegijono, Terry Mart

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1 Citation (Scopus)

Abstract

Based on the first principle calculation, a Lagrangian for the system describing quarks, gluons, and their interactions, is constructed. Ascribed to the existence of dissipative behavior as a consequence of strong interaction within quark-gluon plasma (QGP) matter, auxiliary terms describing viscosities are constituted into the Lagrangian. Through a kind of phase transition, gluon field is redefined as a scalar field with four-vector velocity inherently attached. Then, the Lagrangian is elaborated further to produce the energy-momentum tensor of dissipative fluid-like system and the equation of motion (EOM). By imposing the law of energy and momentum conservation, the values of shear and bulk viscosities are analytically calculated. Our result shows that, at the energy level close to hadronization, the bulk viscosity is bigger than shear viscosity. By making use of the conjectured values η/s∼1/4π and ζ/s∼1, the ratio of bulk to shear viscosity is found to be ζ/η>4π.

Original languageEnglish
Article number1550077
JournalInternational Journal of Modern Physics A
Volume30
Issue number14
DOIs
Publication statusPublished - 20 May 2015

Keywords

  • Bulk viscosity
  • Quark-gluon plasma
  • Shear viscosity

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