Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2002-10-17
Phys.Rev. D69 (2004) 114501
Physics
High Energy Physics
High Energy Physics - Lattice
23 pages. Version accepted for publication in Physical Review D
Scientific paper
10.1103/PhysRevD.69.114501
Quantum chromodynamics (QCD) at sufficiently high density is expected to undergo a chiral phase transition. Understanding such a transition is of particular importance for neutron star or quark star physics. In Lagrangian SU(3) lattice gauge theory, the standard approach breaks down at large chemical potential $\mu$, due to the complex action problem. The Hamiltonian formulation of lattice QCD doesn't encounter such a problem. In a previous work, we developed a Hamiltonian approach at finite chemical potential $\mu$ and obtained reasonable results in the strong coupling regime. In this paper, we extend the previous work to Wilson fermions. We study the chiral behavior and calculate the vacuum energy, chiral condensate and quark number density, as well as the masses of light hadrons. There is a first order chiral phase transition at zero temperature.
Fang Yi-Zhong
Luo Xiang-qian
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