Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bundle gerbes for Chern-Simons and Wess-Zumino-Witten theories   We develop the theory of Chern-Simons bundle 2-gerbes and multiplicative
bundle gerbes associated to any principal $G$-bundle with connection and a
class in $H^4(BG, \ZZ)$ for a compact semi-simple Lie group $G$. The
Chern-Simons bundle 2-gerbe realises differential geometrically the
Cheeger-Simons invariant. We apply these notions to refine the Dijkgraaf-Witten
correspondence between three dimensional Chern-Simons functionals and
Wess-Zumino-Witten models associated to the group $G$. We do this by
introducing a lifting to the level of bundle gerbes of the natural map from
$H^4(BG, \ZZ)$ to $H^3(G, \ZZ)$. The notion of a multiplicative bundle gerbe
accounts geometrically for the subtleties in this correspondence for non-simply
connected Lie groups. The implications for Wess-Zumino-Witten models are also
discussed.

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The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th
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The categories of this paper are: supr-con
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The categories of this paper are: cs
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: nlin