期刊
PHYSICAL REVIEW D
卷 97, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.97.054012
关键词
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资金
- RIKEN special postdoctoral program
- Japan Society for the Promotion of Science (JSPS) [16K17677]
- MEXT [S1511006]
- National Science Foundation [NSF PHY-1125915]
- [15J01626]
- Grants-in-Aid for Scientific Research [15J01626, 16K17677] Funding Source: KAKEN
We elucidate that the phase diagram of massless N-flavor QCD under a Z(N) flavor-twisted boundary condition (massless Z(N)-QCD) is constrained by a 't Hooft anomaly involving two-form gauge fields. As a consequence, massless Z(N)-QCD turns out to realize persistent order at any temperature and quark chemical potential; namely, the symmetric and gapped phase is strictly forbidden. This is the first result on the finite-(T, mu) phase diagram in QCD-type theories based on anomaly matching related to center and discrete axial symmetries.
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