Facts of life with gamma(5)

Authors
Citation
F. Jegerlehner, Facts of life with gamma(5), EUR PHY J C, 18(4), 2001, pp. 673-679
Citations number
57
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
14346044 → ACNP
Volume
18
Issue
4
Year of publication
2001
Pages
673 - 679
Database
ISI
SICI code
1434-6044(200101)18:4<673:FOLWG>2.0.ZU;2-O
Abstract
The increasing precision of many experiments in elementary particle physics leads to continuing interest in perturbative higher order calculations in the electroweak Standard Model or extensions of it. Such calculations are o f increasing complexity because more loops and/or more legs are considered. Correspondingly efficient computational methods are mandatory for many cal culations. One problem which affects the feasibility of higher order calcul ations is the problem with gamma (5) in dimensional regularization. Since t he subject thirty years after its invention is still controversial I advoca te here some ideas which seem not to be common knowledge but might shed som e new light on the problem. I present arguments in favor of utilizing an an ticommuting gamma (5) and a simple 4-dimensional treatment of the hard anom alies.