High Energy Theory Seminar

It is recently recognized that the global symmetry of a theory can be a nontrivial mixture of 0-form and 1-form global symmetries, called 2-group symmetry. A place where 2-group symmetry ubiquitously exists is 6d N=(1,0) little string theories. In this talk I will describe some formulas computing structure constants of the continuous part of the 2-group symmetry of 6d LSTs, and will demonstrate in examples the fact that the structure constants beautifully matches among the LSTs that are expected to be T-dual to each other.