Pantev, TonyRobbins, Daniel G.Sharpe, EricVandermeulen, Thomas2022-09-122022-09-122022-09-05Journal of High Energy Physics. 2022 Sep 05;2022(9):36http://hdl.handle.net/10919/111794In this paper we study three-dimensional orbifolds by 2-groups with a trivially-acting one-form symmetry group BK. These orbifolds have a global two-form symmetry, and so one expects that they decompose into (are equivalent to) a disjoint union of other three-dimensional theories, which we demonstrate. These theories can be interpreted as sigma models on 2-gerbes, whose formal structures reflect properties of the orbifold construction.application/pdfenCreative Commons Attribution 4.0 InternationalArticle - Refereed2022-09-11The Author(s)https://doi.org/10.1007/JHEP09(2022)036