Electromagnetic radiative corrections to pionic beta decay \pi^+ to \pi^0 e^+ \nu_e
高能物理 - 唯象学
2010-11-23 v1
摘要
Pionic beta decay \pi^+ to \pi^0 e^+ \nu_e is analyzed in chiral perturbation theory with virtual photons and leptons. All electromagnetic corrections up to order e^2 p^2 are taken into account. Theoretical results are confronted with preliminary data from a PSI measurement and a value for the CKM matrix element |Vud| is given. Although the precision is presently still below the one of existing determinations of |Vud|, an analysis of pionic beta decay, based on a systematic treatment within a low-energy effective field theory, may become a useful alternative.
引用
@article{arxiv.hep-ph/0209293,
title = {Electromagnetic radiative corrections to pionic beta decay \pi^+ to \pi^0 e^+ \nu_e},
author = {Hannes Pichl},
journal= {arXiv preprint arXiv:hep-ph/0209293},
year = {2010}
}
备注
4 pages, contribution to Proc. of QCD 02, Montpellier, July 2002