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arXiv 0704.2599hep-ph
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chi_b衰变中的包容魅力产生

Inclusive Charm Production in chi_b Decays

Geoffrey T. Bodwin, Eric Braaten, Daekyoung Kang, Jungil Lee

摘要:

我们计算了自旋三重态bottomonium态chi_{bJ}到粲强子的衰变速率,包括首阶色单重态和色八重态bb-棒湮灭机制。我们还从chi_{bJ}的衰变计算了粲夸克的动量分布。来自色单重态过程bb-bar -> cc-bar g的红外发散被计入色八重态中bb-bar对的原点处的概率密度。这个概率密度可以从现象学上由包含粲强子的chi_{bJ}衰变的分数确定。然后,它可以被用来预测部分宽度轻强子的所有四个国家的P波底重态。

英文摘要:

We calculate the inclusive decay rate of the spin-triplet bottomonium states chi_{bJ} into charm hadrons, including the leading-order color-singlet and color-octet bb-bar annihilation mechanisms. We also calculate the momentum distribution of the charm quark from the decay of chi_{bJ}. The infrared divergences from the color-singlet process bb-bar -> cc-bar g are factored into the probability density at the origin for a bb-bar pair in a color-octet state. That probability density can be determined phenomenologically from the fraction of decays of chi_{bJ} that include charm hadrons. It can then be used to predict the partial widths into light hadrons for all four states in the P-wave bottomonium multiplet.

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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