From gauge anomalies to gerbes and gerbal actions
Differential Geometry
2008-12-12 v1 High Energy Physics - Theory
Mathematical Physics
math.MP
Abstract
The purpose of this contribution is to point out connections between recent ideas about gerbes and gerbal actions (as higher categorical extension of representation theory) and old discussion in quantum field theory on commutator anomalies, gauge group extensions, and 3-cocycles. The unifying concept is the classical obstruction theory for group extensions as explained in the reference [ML].
Keywords
Cite
@article{arxiv.0812.1640,
title = {From gauge anomalies to gerbes and gerbal actions},
author = {Jouko Mickelsson},
journal= {arXiv preprint arXiv:0812.1640},
year = {2008}
}
Comments
11 pages, based on the talk on "Fractional Loop Groups" at the meeting "Motives, Quantum Field Theory, and Pseudodifferential Operators", Boston University, June 2-13, 2008