arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0709.2439hep-ph
收藏

多体介子衰变的软光子修正

Soft-photon corrections in multi-body meson decays

Gino Isidori

摘要:

本文分析了B、D和K介子多体衰变中软光子辐射的效应(以及相应的虚修正)。我们提出了通用的O(α)校正因子的解析表达式,它可以适用于所有的多体衰变模式,其中一个紧密的软光子能量削减的衰变粒子静止帧。本文还讨论了在末态粒子速度的大小范围内有效的全阶近似。简要分析了这些修正因子在K ~ 3 π衰变Dalitz图分布畸变中的唯象意义。

英文摘要:

The effects due to soft-photon emission (and the related virtual corrections) in multi-body decays of B, D, and K mesons are analysed. We present analytic expressions for the universal O(alpha) correction factors which can be applied to all multi-body decay modes where a tight soft-photon energy cut in the decaying-particle rest-frame is applied. All-order resummations valid in the limit of small and large velocities of the final-state particles are also discussed. The phenomenological implications of these correction factors in the distortion of Dalitz-plot distributions of K -> 3 pi decays are briefly analysed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑