QCD EQUATION OF STATE FOR TWO FLAVOURS AT NON-ZERO CHEMICAL POTENTIAL.

Conference · Thu Aug 04 00:00:00 EDT 2005

OSTI ID:860503

DORING, M; EJIRI, S; KACZMAREK, O; KARSCH, F; LAERMANN, E; ALLTON, C R; HANDS, S J; REDLICH, K

We present results of a simulation of 2 flavour QCD on a 16{sup 3} x 4 lattice using p4-improved staggered fermions with bare quark mass m/T = 0.4. Derivatives of the thermodynamic grand canonical partition function Z(V,T,{mu}{sub u},{mu}{sub d}) with respect to chemical potentials {mu}{sub u,d} for different quark flavours are calculated up to sixth order, enabling estimates of the pressure and the quark number density as well as the chiral condensate and various susceptibilities as functions of {mu}{sub u,d} via Taylor series expansion. Results are compared to high temperature perturbation theory as well as a hadron resonance gas model. We also analyze baryon as well as isospin fluctuations and discuss the relation to the chiral critical point in the QCD phase diagram. We moreover discuss the dependence of the heavy quark free energy on the chemical potential.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: DOE/SC
• DOE Contract Number: DE-AC02-98CH10886
• OSTI ID: 860503
• Report Number(s): BNL-75084-2005-CP; R&D Project: PO-22; YN0100000; TRN: US0504934
• Resource Relation: Conference: QUARK MATTER 2005 18TH INTERNATIONAL CONFERENCE ON NUCLEUS-NUCLEUS COLLISIONS; BUDAPEST, HUNGARY; 20050804 through 20050809
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BARYONS
CONDENSATES
FERMIONS
FLUCTUATIONS
FREE ENERGY
HADRONS
ISOSPIN
PARTITION FUNCTIONS
PERTURBATION THEORY
PHASE DIAGRAMS
QUANTUM CHROMODYNAMICS
QUARK MATTER
QUARKS
RESONANCE
SERIES EXPANSION
SIMULATION
THERMODYNAMICS