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arXiv 1406.7013hep-ph
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B -> Xc τ nu衰变分布的精确预测

Precise predictions for B -> Xc tau nu decay distributions

Zoltan Ligeti, Frank J. Tackmann

摘要:

我们得到精确的标准模型预测的双轻子不变质量和τ能量分布的包容B -> Xc τ nu衰变。我们使用1 S短程质量方案包括Lambda_QCD ^2/m_b^2和alpha_s修正,并估计最大τ能量附近的形状函数效应。这些结果可以提高b -> c τ nu相关观测量对超标准模型物理的灵敏度。

英文摘要:

We derive precise standard model predictions for the dilepton invariant mass and the tau energy distributions in inclusive B -> Xc tau nu decay. We include Lambda_QCD^2/m_b^2 and alpha_s corrections using the 1S short-distance mass scheme, and estimate shape function effects near maximal tau energy. These results can improve the sensitivity of b -> c tau nu related observables to beyond standard model physics.

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