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arXiv 2008.09532hep-phhep-exnucl-exnucl-th
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超前射流能量损失的计算

Calculating the energy loss of leading jets

Duff Neill, Felix Ringer, Nobuo Sato

摘要:

喷注的能量损失机制在核物理和高能物理中起着核心作用。我们提出了直接测量领先的喷气机的能量损失,并进行了计算,在下一个领先的对数(NLL $'$)在真空中的准确性。领先射流的形成可以用射流函数来描述,射流函数构成概率密度,从而允许对平均能量损失进行微扰计算。我们确定了以下三个标准,用于在截面水平上直接测量射流能量损失。$i)$我们测量一个定义明确的对象,领先的射流,其中的形成过程可以表示在概率密度方面。$ii)$此外,我们需要测量一个硬参考标度,并根据该标度定义喷射能量损失。$iii)$在领先的对数精度,我们要求喷流能量损失可以识别部分子能量损失。我们讨论了合适的观测值和目前的数值结果,包括阈值修正利用部分子簇射蒙特卡罗方法。

英文摘要:

The energy loss mechanism of jets plays a central role in nuclear and high energy physics. We propose direct measurements of the energy loss of leading jets and perform a calculation at next-to-leading logarithmic (NLL$'$) accuracy in the vacuum. The formation of leading jets can be described by jet functions which constitute probability densities and thus allow for a perturbative calculation of the average the energy loss. We identify the following three criteria for a direct measurement of jet energy loss at the cross section level. $i)$ We measure a well defined object, the leading jet, where the formation process can be expressed in terms of a probability density. $ii)$ In addition, we need a measurement of a hard reference scale with respect to which jet energy loss is defined. $iii)$ At leading logarithmic accuracy, we require that the jet energy loss can be identified with parton energy loss. We discuss suitable observables and present numerical results including threshold corrections by making use of a parton shower Monte Carlo approach.

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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