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On discrete anomalies in chiral gauge theories

Published version
Peer-reviewed

Type

Article

Change log

Authors

Smith, Philip Boyle 
Karasik, Avner 
Lohitsiri, Nakarin 

Abstract

jats:titleAjats:scbstract</jats:sc> </jats:title>jats:pWe study two well-known SU(jats:italicN</jats:italic>) chiral gauge theories with fermions in the symmetric, anti-symmetric and fundamental representations. We give a detailed description of the global symmetry, including various discrete quotients. Recent work argues that these theories exhibit a subtle mod 2 anomaly, ruling out certain phases in which the theories confine without breaking their global symmetry, leaving a gapless composite fermion in the infra-red. We point out that no such anomaly exists. We further exhibit an explicit path to the gapless fermion phase, showing that there is no kinematic obstruction to realising these phases.</jats:p>

Description

Keywords

Anomalies in Field and String Theories, Discrete Symmetries, Confinement, Nonperturbative Effects

Journal Title

JOURNAL OF HIGH ENERGY PHYSICS

Conference Name

Journal ISSN

1029-8479
1029-8479

Volume Title

2022

Publisher

Springer Science and Business Media LLC
Sponsorship
Simons Foundation (567525)
STFC (ST/T000694/1)
EPSRC (EP/V047655/1)