Strong-coupling analysis of parity phase structure in staggered-Wilson fermions

Tatsuhiro Misumi, Takashi Z. Nakano, Taro Kimura, Akira Ohnishi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We study strong-coupling lattice QCD with staggered-Wilson fermions, with an emphasis on discrete symmetries and the possibility of their spontaneous breaking. We perform hopping parameter expansion and effective potential analyses in the strong-coupling limit. From gap equations we find the nonzero pion condensate in some range of a mass parameter, which indicates the existence of the parity-broken phase in lattice QCD with staggered-Wilson fermions. We also find massless pions and PCAC relations around the second-order phase boundary. These results suggest that we can take a chiral limit by tuning a mass parameter in lattice QCD with staggered-Wilson fermions as we would with the Wilson fermion.

Original languageEnglish
Article number034501
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume86
Issue number3
DOIs
Publication statusPublished - 2012 Aug 8

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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