Order Parameters and Color-Flavor Center Symmetry in QCD

Common lore implies that N -color QCD with massive quarks has no useful order parameters that can be nontrivial at zero baryon density. However, such order parameters do exist when there are nf quark flavors with a common mass and d≡gcd ( nf,N ) >1 . These theories have a Z d color-flavor center...

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Bibliographic Details
Published in:Physical review letters 2017-11, Vol.119 (22)
Main Authors: Cherman, Aleksey, Sen, Srimoyee, Ünsal, Mithat, Wagman, Michael L., Yaffe, Laurence G.
Format: Article
Language:English
Subjects:
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Online Access:Get full text
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Summary:Common lore implies that N -color QCD with massive quarks has no useful order parameters that can be nontrivial at zero baryon density. However, such order parameters do exist when there are nf quark flavors with a common mass and d≡gcd ( nf,N ) >1 . These theories have a Z d color-flavor center symmetry arising from intertwined color center transformations and cyclic flavor permutations. Furthermore, the symmetry realization depends on the temperature, baryon chemical potential, and value of nf / N , with implications for conformal window studies and dense quark matter.
ISSN:0031-9007