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arXiv · 1201.3235

Freed-Witten anomaly and D-brane gauge theories

Fabio Ferrari Ruffino
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Abstract

We discuss the different nature of the gauge theories on a D-brane or a stack of D-branes, in type II superstring theory, as follows from the Freed-Witten anomaly. Usually on a D-brane world-volume there is a standard gauge theory, described by the A-field thought of as a connection on a complex vector bundle. Actually, this is a particular case, even if it is the most common one. In order to get a complete picture, within the framework provided by the geometry of gerbes with connection, it is necessary to give a joint geometrical description of the A-field and the B-field, via the language of Cech hypercohomology. The Freed-Witten anomaly, which is a global world-sheet anomaly, imposes some constraints on such fields: we will show for each case what is the nature of the corresponding gauge theory on the D-brane or stack of D-branes.

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Fabio Ferrari Ruffino. 2012-01-16. Freed-Witten anomaly and D-brane gauge theories. https://arxiv.org/abs/1201.3235

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