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arXiv 0903.2298hep-lathep-ph
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含动力学夸克的Isgur-Wise函数tau_{1/2}和tau_{3/2}的格点计算

Lattice calculation of the Isgur-Wise functions tau_{1/2} and tau_{3/2} with dynamical quarks

ETM Collaboration, Benoit Blossier, Marc Wagner, Olivier Pene

摘要:

我们进行了动态晶格计算的Isgur明智的功能tau_{1/2}和tau_{3/2}在零反冲。我们考虑了对应于300 MeV < m_{PS} < 450 MeV的三种不同的轻夸克质量,这使我们能够将我们的结果外推到物理的u/d夸克质量。我们发现tau_{1/2}(1)= 0.296(26)和tau_{3/2}(1)= 0.526(23)。Uraltsev求和规则被基态饱和到80%。本文讨论了半轻子衰变B --> Xclnu的意义以及与之相关的“1/2对3/2”之谜.

英文摘要:

We perform a dynamical lattice computation of the Isgur-Wise functions tau_{1/2} and tau_{3/2} at zero recoil. We consider three different light quark masses corresponding to 300 MeV < m_{PS} < 450 MeV, which allow us to extrapolate our results to the physical u/d quark mass. We find tau_{1/2}(1) = 0.296(26) and tau_{3/2}(1) = 0.526(23). Uraltsev's sum rule is saturated up to 80% by the ground state. We discuss implications regarding semileptonic decays B --> X_c l nu and the associated "1/2 versus 3/2" puzzle.

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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