Point-splitting regularization of composite operators and anomalies

Details Point-splitting regularization of composite operators and anomalies Point-splitting regularization of composite operators and anomalies

1998-03-30

arxiv.org/abs/hep-th/9803244v1

Fortsch.Phys. 48 (2000) 253-302

Physics

High Energy Physics

High Energy Physics - Theory

42 pages, LATEX 2.09, a4wide

Scientific paper

The point-splitting regularization technique for composite operators is discussed in connection with anomaly calculation. We present a pedagogical and self-contained review of the topic with an emphasis on the technical details. We also develop simple algebraic tools to handle the path ordered exponential insertions used within the covariant and non-covariant version of the point-splitting method. The method is then applied to the calculation of the chiral, vector, trace, translation and Lorentz anomalies within diverse versions of the point-splitting regularization and a connection between the results is described. As an alternative to the standard approach we use the idea of deformed point-split transformation and corresponding Ward-Takahashi identities rather than an application of the equation of motion, which seems to save the complexity of the calculations.

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