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arXiv 1306.0919hep-ph
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Z产生的低phistar域的重新确定

The resummation of the low-phistar domain of Z production

Lee Tomlinson

摘要:

在对观测量的QCD修正中,由于存在大量的非线性项,使得有限阶截断计算的有效性受到影响,需要采用全阶方法。强子对撞机中由Drell-Yan机制产生的大质量轻子对的横动量谱$Q_T$在电弱唯象学中受到了广泛的关注。我们提出并讨论了一个相关的观测,即$ϕ^*$(phistar),这是最近推出的,因为它的独特的实验优势,但它仍然是敏感的类似的物理:软共线胶子发射的初始状态下的下一个下一个领先的日志(NNLL)图解计算。我们还提出了各种比较Tevatron和LHC的碰撞数据。

英文摘要:

The presence of large logarithms in QCD corrections to observables spoils the validity of a calculation truncated at finite order and calls for an all-orders approach. The transverse momentum, $Q_T$, spectrum of massive lepton pairs, produced in hadron colliders by the Drell-Yan mechanism, has received a great deal of attention in electroweak phenomenology. We present and discuss a next-to-next-to-leading log (NNLL) resummed calculation of a related observable, namely $ϕ^*$ (phistar), that was recently introduced because of its distinct experimental advantages, but which is nonetheless sensitive to similar physics: soft-collinear gluon emission in the initial state. We also present various comparisons to collision data at the Tevatron and the LHC.

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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