Repository logo
 

On discrete anomalies in chiral gauge theories

Published version
Peer-reviewed

Change log

Authors

Smith, Philip Boyle 
Karasik, Avner 
Lohitsiri, Nakarin 

Abstract

: We study two well-known SU(N) 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.

Description

Keywords

Regular Article - Theoretical Physics, 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)