説明
We propose a new framework for investigating two-flavor lattice QCD with finite temperature and density. We consider the Karsten-Wilczek fermion formulation, in which a species-dependent imaginary chemical potential term can reduce the number of species to two without losing chiral symmetry. This lattice discretization is useful for study on finite-($T$,$��$) QCD since its discrete symmetries are appropriate for the case. To show its applicability, we study strong-coupling lattice QCD with temperature and chemical potential. We derive the effective potential of the scalar meson field and obtain a critical line of the chiral phase transition, which is qualitatively consistent with the phenomenologically expected phase diagram. We also discuss that $O(1/a)$ renormalization of imaginary chemical potential can be controlled by adjusting a parameter of a dimension-3 counterterm.
21 pages, 11 figures
収録刊行物
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- Proceedings of The 30th International Symposium on Lattice Field Theory — PoS(Lattice 2012)
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Proceedings of The 30th International Symposium on Lattice Field Theory — PoS(Lattice 2012) 079-, 2012-12-20
Sissa Medialab