TY - JOUR

T1 - Viscosities of gluon dominated QGP model within relativistic non-Abelian hydrodynamics

AU - Djun, T. P.

AU - Handoko, L. T.

AU - Soegijono, Bambang

AU - Mart, Terry

PY - 2015/5/20

Y1 - 2015/5/20

N2 - 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.

AB - 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.

KW - Bulk viscosity

KW - Quark-gluon plasma

KW - Shear viscosity

UR - http://www.scopus.com/inward/record.url?scp=85027932633&partnerID=8YFLogxK

U2 - 10.1142/S0217751X15500773

DO - 10.1142/S0217751X15500773

M3 - Article

AN - SCOPUS:85027932633

VL - 30

JO - International Journal of Modern Physics A

JF - International Journal of Modern Physics A

SN - 0217-751X

IS - 14

M1 - 1550077

ER -