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arXiv hep-ph/0408339hep-ph
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包含B衰变的QCD因子化和|Vub|

QCD-Factorization of inclusive B decays and |Vub|

Bjorn O. Lange

摘要:

本文报道了形状函数区B到X_ul nu衰变的理论描述的最新进展。形状函数的有限矩与HQET参数有关。事件分数几个实验削减,特别强调强子变量P+。本文的目的是介绍P ~+能谱,并将其与强子不变质量谱和荷轻子能谱进行比较,探讨在B ~ X_c衰变的大背景下计算|Vub|的前景。

英文摘要:

Recent progress in the theoretical description of inclusive B to X_u l nu decays in the shape-function region is reported. Finite moments of the shape function are related to HQET parameters. Event fractions for several experimental cuts are presented, with a particular emphasis on the hadronic variable P+. The aim of this talk is to introduce the P+ spectrum, to compare it to the hadronic invariant mass spectrum and the charged-lepton energy spectrum, and to study the prospect of evaluating |Vub| in the presence of a large background from B to X_c decays.

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。

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