# 2-Group Symmetries of 6D Little String Theories and T-Duality

@article{DelZotto20202GroupSO, title={2-Group Symmetries of 6D Little String Theories and T-Duality}, author={Michele Del Zotto and Kantaro Ohmori}, journal={arXiv: High Energy Physics - Theory}, year={2020} }

We determine the 2-group structure constants for all the six-dimensional little string theories (LSTs) geometrically engineered in F-theory without frozen singularities. We use this result as a consistency check for T-duality: the 2- groups of a pair of T-dual LSTs have to match. When the T-duality involves a discrete symmetry twist the 2-group used in the matching is modified. We demonstrate the matching of the 2-groups in several examples.

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