Comments on Anomaly Cancellations by Pole Subtractions and Ghost Instabilities with Gravity

Details Comments on Anomaly Cancellations by Pole Subtractions and Ghost Instabilities with Gravity Comments on Anomaly Cancellations by Pole Subtractions and Ghost Instabilities with Gravity

2011-03-08

arxiv.org/abs/1103.1590v4

Class.Quant.Grav.28:145004,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages. Revised version. To appear in "Classical and Quantum Gravity"

Scientific paper

10.1088/0264-9381/28/14/145004

We investigate some aspects of anomaly cancellation realized by the subtraction of an anomaly pole, stressing on some of its properties in superspace. In a local formulation these subtractions can be described in terms of a physical scalar, an axion and related ghosts. They appear to be necessary for the unitarization of the theory in the ultraviolet, but they may generate an infrared instability of the corresponding effective action, signalled by ghost condensation. In particular the subtraction of the superanomaly multiplet by a pole in superspace is of dubious significance, due to the different nature of the chiral and conformal anomalies. In turn, this may set more stringent constraints on the coupling of supersymmetric theories to gravity.

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