长距离辐射修正到双π介子τ轻子衰变
高能物理 - 唯象学
2009-11-11 v2
摘要
我们利用介子优势模型评估了O(α)长距离辐射修正对τ^- → π^- π^0 ν_τ 衰变的影响。我们发现这些修正对双π子不变质量谱的影响比基于手征微扰理论的前期计算要小。对光子包含率的相应修正非常微小(-0.15%),但当新测量达到更高精度时可能具有相关性。
引用
@article{arxiv.hep-ph/0608084,
title = {Long-distance radiative corrections to the di-pion tau lepton decay},
author = {F. Flores-Baez and A. Flores-Tlalpa and G. Lopez Castro and G. Toledo Sanchez},
journal= {arXiv preprint arXiv:hep-ph/0608084},
year = {2009}
}
备注
4 pages, 2 figures. An estimate of the shift produced in the evaluation of the h.v.p. contribution to the muon anomalous magnetic moment is added. Version to appear in Phys. Rev. D