2006/11/30 by Liang-Kai Wu, Xiang-Qian Luo, He-Sheng Chen · 105 citations
Physics and Astronomy · #Baryon #Condensed matter physics #High-Energy Particle Collisions Research #Lattice (music) #Lattice QCD #Lattice field theory #Meson #Particle physics #Phase transition #Physics #Pion #Pseudoscalar #Pseudoscalar meson #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #Theoretical and Computational Physics #hep-lat
paper · pdf · doi:10.1103/physrevd.76.034505
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 76(3) (American Physical Society) · 10 pages, 17 figures;16 figures;9 pages,10 figures;10 pages,11 figures
arxiv created 2007/07/08 · openalex publication_date 2007/08/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present results for phase structure of lattice QCD with two degenerate flavors (Nf=2) of Wilson quarks at finite temperature T and small baryon chemical potential \ensuremathμB. Using the imaginary chemical potential for which the fermion determinant is positive, we perform simulations at points where the ratios of pseudoscalar meson mass to the vector meson mass m_\ensuremathπ/m_\ensuremathρ are between 0.943(3) and 0.899(4) as well as in the quenched limit. By analytic continuation to real quark chemical potential \ensuremathμ, we obtain the transition temperature as a function of small \ensuremathμB. We attempt to determine the nature of transition at imaginary chemical potential by histogram, Monte Carlo (MC) history, and finite size scaling. In the infinite heavy quark limit, the transition is of first order. At intermediate values of quark mass mq corresponding to the ratio of m_\ensuremathπ/m_\ensuremathρ in the range from 0.943(3) to 0.899(4) at a\ensuremathμI=0.24, the MC simulations show the absence of phase transition.