Anomalies, a mod 2 index, and dynamics of 2d adjoint QCD

@article{Cherman2019AnomaliesAM,
  title={Anomalies, a mod 2 index, and dynamics of 2d adjoint QCD},
  author={Aleksey Cherman and Theodore N. Jacobson and Yuya Tanizaki and Mithat Unsal},
  journal={arXiv: High Energy Physics - Theory},
  year={2019}
}
We show that $2$d adjoint QCD, an $SU(N)$ gauge theory with one massless adjoint Majorana fermion, has a variety of mixed 't Hooft anomalies. The anomalies are derived using a recent mod $2$ index theorem and its generalization that incorporates 't Hooft flux. Anomaly matching and dynamical considerations are used to determine the ground-state structure of the theory. The anomalies, which are present for most values of $N$, are matched by spontaneous chiral symmetry breaking. We find that… Expand

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