Instantons, symmetries and anomalies in five dimensions
Instantons, symmetries and anomalies in five dimensions
A bstract All five-dimensional non-abelian gauge theories have a U(1) I global symmetry associated with instantonic particles. We describe an obstruction to coupling U(1) I to a classical background gauge field that occurs whenever the theory has a one-form center symmetry. This is a finite-order mixed ’t Hooft anomaly between …