Color SU(3)強結合Lattice QCDにおける高温-高密度Chiral相転移の結合定数による発展(熱場の量子論とその応用,研究会報告)

概要

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We investigate the phase diagram evolution with the finite coupling 1/g^2 in the color SU(N_c=3) strong coupling lattice QCD with one species of staggered fermions at finite quark chemical potential (μ) and finite temperature (T). We evaluate the next to leading order of the strong coupling expansion, and obtain the following results: (1) The ratio of the critical value (μ_c/T_c)becomes closer to the empirical value. (2) As the coupling decreases, the second order transition on the T axis evolves to the first order, and T_c is found to be consistent with lattice Monte-Carlo simulations. (3) The "Partially Chiral Restored Phase" appears in low temperature and high density region.
素粒子論グループ素粒子論研究編集部の論文
2009-02-20