$O(\alpha_s^2)$下BR(B \to X_s \gamma)的估计
高能物理 - 唯象学
2008-11-26 v2
摘要
结合我们对弱辐射B介子衰变各种 纠正的结果，我们能够在量子色动力学中给出分支比率的第一个 估计。我们发现 BR(B \to X_s \gamma) = (3.15 +_ 0.23) \times 10^{-4} 当 GeV 时，B介子 rest frame中。四种不确定性：非扰动(5%)、参数(3%)、高阶(3%)和 �值歧义(3%) 已平方求和得到总误差。
引用
@article{arxiv.hep-ph/0609232,
title = {Estimate of BR(B -> X_s gamma) at O(alpha_s^2)},
author = {M. Misiak and H. M. Asatrian and K. Bieri and M. Czakon and A. Czarnecki and T. Ewerth and A. Ferroglia and P. Gambino and M. Gorbahn and C. Greub and U. Haisch and A. Hovhannisyan and T. Hurth and A. Mitov and V. Poghosyan and M. Slusarczyk and M. Steinhauser},
journal= {arXiv preprint arXiv:hep-ph/0609232},
year = {2008}
}
备注
4 pages, 4 figures. Version accepted by the PRL. Words disallowed by the journal removed from the title. References updated and a note added