New insights concerning dimension-eight effects in weak decays
High Energy Physics - Phenomenology
2009-10-31 v1
Abstract
Most past work on weak nonleptonic decays has mixed dimensional regularization in the weak operator product expansion with some form of a cutoff regularization in the evaluation of the matrix elements. Even with the usual technique of matching the two schemes, this combination misses physics at short distance which can be described by dimension eight (and higher dimension) operators. I describe some recent work with V. Cirigliano and E. Golowich which clarifies these effects and provides a numerical estimate suggesting that they are important.
Keywords
Cite
@article{arxiv.hep-ph/0012072,
title = {New insights concerning dimension-eight effects in weak decays},
author = {John F. Donoghue},
journal= {arXiv preprint arXiv:hep-ph/0012072},
year = {2009}
}
Comments
3 pages, talk presented at the Division of Particles and Fields Meeting, DPF 2000, Columbus, Ohio, Aug. 2000