Title:	Global anomalies in canonical gravity
Authors:	Surya, Sumati Vaidya, Sachindeo
Issue Date:	Jul-1998
Publisher:	Elsevier B. V.
Citation:	Nuclear Physics B, 1998, Vol.523, p391-402
Abstract:	In this note we study the structure of diffeomorphism anomalies in 3+1 canonical gravity coupled to a chiral massless fermion. We find that when the spatial manifold Σ is S3 or a Lens space L(p,q), the first homotopy group of the related diffeomorphism group can be non-trivial and hence the question of global anomalies becomes relevant. Here we show that for gravity coupled to SU(2) chiral fermions, assuming the strong form of the Hatcher conjecture, SU(2)-induced diffeomorphism anomalies do not occur whenever Σ is S3 or a Lens space.
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/4544
Alternative Location:	http://arxiv.org/abs/hep-th/9709170 http://dx.doi.org/10.1016/S0550-3213(98)00286-7 http://adsabs.harvard.edu/abs/1998NuPhB.523..391S
Copyright:	1998 Elsevier B.V.
Appears in Collections:	Research Papers (TP)

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