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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.
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Copyright: 1998 Elsevier B.V.
Appears in Collections:Research Papers (TP)

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