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arXiv 0909.0858hep-lathep-ph
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Isgur-Wise函数tau_{1/2}和tau_{3/2}的动力学格计算

Dynamical lattice computation of the Isgur-Wise functions tau_{1/2} and tau_{3/2}

ETM Collaboration, Benoit Blossier, Marc Wagner, Olivier Pene

摘要:

我们进行了两个风味的动态晶格计算的Isgur-Wise功能tau_{1/2}和tau_{3/2}在零反冲的静态限制。我们发现tau_{1/2}(1)= 0.297(26)和tau_{3/2}(1)= 0.528(23)满足Uraltsev求和规则约80%。我们还评论了一个持久的理论和实验之间的冲突,关于半轻子衰变的B介子轨道激发P波D介子,所谓的“1/2与3/2之谜”,我们讨论了晶格结果在这种情况下的相关性。

英文摘要:

We perform a two-flavor dynamical lattice computation of the Isgur-Wise functions tau_{1/2} and tau_{3/2} at zero recoil in the static limit. We find tau_{1/2}(1) = 0.297(26) and tau_{3/2}(1) = 0.528(23) fulfilling Uraltsev's sum rule by around 80%. We also comment on a persistent conflict between theory and experiment regarding semileptonic decays of B mesons into orbitally excited P wave D mesons, the so-called "1/2 versus 3/2 puzzle", and we discuss the relevance of lattice results in this context.

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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