Anomalies in field theories with extra dimensions

Details Anomalies in field theories with extra dimensions Anomalies in field theories with extra dimensions

2004-03-16

arxiv.org/abs/hep-th/0403163v2

Int.J.Mod.Phys. A19 (2004) 2579-2642

Physics

High Energy Physics

High Energy Physics - Theory

Review article written for Int.J.Mod.Phys. A, 63 pages; v2: mistake in subsection 4.3 corrected, some comments and references

Scientific paper

10.1142/S0217751X04018518

We give an overview of the issue of anomalies in field theories with extra dimensions. We start by reviewing in a pedagogical way the computation of the standard perturbative gauge and gravitational anomalies on non-compact spaces, using Fujikawa's approach and functional integral methods, and discuss the available mechanisms for their cancellation. We then generalize these analyses to the case of orbifold field theories with compact internal dimensions, emphasizing the new aspects related to the presence of orbifold singularities and discrete Wilson lines, and the new cancellation mechanisms that are becoming available. We conclude with a very brief discussion on global and parity anomalies.

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