Abstract
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,μ) 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.
| Original language | English |
|---|---|
| Article number | 094505 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 86 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2012 Nov 6 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Nuclear and High Energy Physics
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QCD phase diagram with two-flavor lattice fermion formulations. / Misumi, Tatsuhiro; Kimura, Taro; Ohnishi, Akira.
In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 86, No. 9, 094505, 06.11.2012.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - QCD phase diagram with two-flavor lattice fermion formulations
AU - Misumi, Tatsuhiro
AU - Kimura, Taro
AU - Ohnishi, Akira
PY - 2012/11/6
Y1 - 2012/11/6
N2 - 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,μ) 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.
AB - 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,μ) 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.
UR - http://www.scopus.com/inward/record.url?scp=84869054050&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84869054050&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.86.094505
DO - 10.1103/PhysRevD.86.094505
M3 - Article
AN - SCOPUS:84869054050
VL - 86
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
SN - 1550-7998
IS - 9
M1 - 094505
ER -