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arXiv 0711.3476hep-phhep-exnucl-th
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重夸克偶素产生的色传递增强

Color Transfer Enhancement for Heavy Quarkonium Production

Gouranga C. Nayak, Jian-Wei Qiu, George Sterman

摘要:

本文研究了重夸克对与相对于它以非相对论速度运动的非成对重夸克或反夸克之间的色转移。我们发现开重夸克或反夸克可以催化夸克对从短距离的八重态到长距离的单重态的转变。这个过程是红外敏感的一般情况下,我们表现出双极点的尺寸正则化在下一个到下一个到领先的顺序的过渡概率。由于它们依赖于运动学变量,这些极点不能与基于单个重夸克对的有效场论的非微扰矩阵元相匹配。

英文摘要:

We study the transfer of color between a heavy quark pair and an unpaired heavy quark or antiquark moving at a nonrelativistic velocity with respect to the pair. We find that the open heavy quark or antiquark can catalyze the transformation of the pair from octet representation at short distances to singlet at long distances. This process is infrared sensitive in general, and we exhibit double poles in dimensional regularization at next-to-next-to-leading order in the transition probability. Because of their dependence on kinematic variables, these poles cannot be matched to the non-perturbative matrix elements of effective field theories based on a single heavy quark pair.

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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