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arXiv 1808.09014hep-ph
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顶夸克与光子通过反常耦合的联合产生

Associated production of a top quark with a photon via anomalous couplings

Matthew Forslund, Nikolaos Kidonakis

摘要:

讨论了顶夸克与光子通过反常$t$ - $γ$耦合的关联产生,并给出了LHC能区$gq \rightarrow tγ$过程的软胶子发射的高阶修正.我们进行软胶子重混在下一个领导对数精度,并获得近似的下一个下一个领导阶(aNNLO)的双微分截面。在aNNLO条件下,我们计算了各种LHC能量下的总$tγ$产生截面和顶夸克横动量及快度分布,并表明软胶子修正在这些过程中是很大的且占主导地位的.

英文摘要:

We discuss the associated production of a top quark with a photon via anomalous $t$-$q$-$γ$ couplings, and present higher-order corrections from soft-gluon emission for the processes $gq \rightarrow tγ$ at LHC energies. We perform soft-gluon resummation at next-to-leading-logarithm accuracy and derive approximate next-to-next-to-leading order (aNNLO) double-differential cross sections. We calculate at aNNLO the total $tγ$ production cross sections and the top-quark transverse-momentum and rapidity distributions for various LHC energies, and show that the soft-gluon corrections are large and dominant in these processes.

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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