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Study of the Critical Point in Lattice QCD at High Temperature and Density.

DE2008920315

Publication Date	2007
Personal Author	Ejiri, S.
Page Count	9
Abstract	We propose a method to probe the nature of phase transitions in lattice QCD at finite temperature and density, which is based on the investigation of an effective potential as a function of the average plaquette. We analyze data obtained in a simulation of two-flavor QCD using p4-improved staggered quarks with bare quark mass m/T = 0.4, and find that a first order phase transition line appears in the high density regime for micro(sub q)/T equal to or greater than 2.5. The effective potential as a function of the quark number density is also studied. We calculate the chemical potential as a function of the density from the canonical partition function and discuss the existence of the first order phase transition line.
Keywords	Phase transitions Quantum chromodynamics (QCD) Quark matter Temperature Density Data analysis Quarks Thermodynamics Heavy ion Lattice field theory
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Brookhaven National Lab., Upton, NY.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200817
Contract Number	DE-AC02-98CH10886

Study of the Critical Point in Lattice QCD at High Temperature and Density.

Study of the Critical Point in Lattice QCD at High Temperature and Density.
DE2008920315

Publication Date	2007
Personal Author	Ejiri, S.
Page Count	9
Abstract	We propose a method to probe the nature of phase transitions in lattice QCD at finite temperature and density, which is based on the investigation of an effective potential as a function of the average plaquette. We analyze data obtained in a simulation of two-flavor QCD using p4-improved staggered quarks with bare quark mass m/T = 0.4, and find that a first order phase transition line appears in the high density regime for micro(sub q)/T equal to or greater than 2.5. The effective potential as a function of the quark number density is also studied. We calculate the chemical potential as a function of the density from the canonical partition function and discuss the existence of the first order phase transition line.
Keywords	Phase transitions Quantum chromodynamics (QCD) Quark matter Temperature Density Data analysis Quarks Thermodynamics Heavy ion Lattice field theory
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Brookhaven National Lab., Upton, NY.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200817
Contract Number	DE-AC02-98CH10886