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Journal of High Energy Physics

, 2015:159 | Cite as

Lattice study on QCD-like theory with exact center symmetry

  • Takumi IritaniEmail author
  • Etsuko Itou
  • Tatsuhiro Misumi
Open Access
Regular Article - Theoretical Physics

Abstract

We investigate QCD-like theory with exact center symmetry, with emphasis on the finite-temperature phase transition concerning center and chiral symmetries. On the lattice, we formulate center symmetric SU(3) gauge theory with three fundamental Wilson quarks by twisting quark boundary conditions in a compact direction (Z 3-QCD model). We calculate the expectation value of Polyakov loop and the chiral condensate as a function of temperature on 163 × 4 and 203 × 4 lattices along the line of constant physics realizing m PS /m V = 0.70. We find out the first-order center phase transition, where the hysteresis of the magnitude of Polyakov loop exists depending on thermalization processes. We show that chiral condensate decreases around the critical temperature in a similar way to that of the standard three-flavor QCD, as it has the hysteresis in the same range as that of Polyakov loop. We also show that the flavor symmetry breaking due to the twisted boundary condition gets qualitatively manifest in the high-temperature phase. These results are consistent with the predictions based on the chiral effective model in the literature. Our approach could provide novel insights to the nonperturbative connection between the center and chiral properties.

Keywords

Confinement Spontaneous Symmetry Breaking Lattice Gauge Field Theories 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2015

Authors and Affiliations

  • Takumi Iritani
    • 1
    Email author
  • Etsuko Itou
    • 2
  • Tatsuhiro Misumi
    • 3
    • 4
  1. 1.Department of Physics and AstronomyStony Brook UniversityStony BrookU.S.A.
  2. 2.KEK Theory Center, High Energy Accelerator Research Organization (KEK)TsukubaJapan
  3. 3.Department of Mathematical ScienceAkita UniversityAkitaJapan
  4. 4.Research and Education Center for Natural ScienceKeio UniversityYokohamaJapan

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