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arXiv 2103.09844hep-phhep-exhep-th
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高能轻子的夸克和胶子含量

Quark and Gluon Contents of a Lepton at High Energies

Tao Han, Yang Ma, Keping Xie

摘要:

在高能轻子碰撞中,例如在多TeV μ子对撞机上,电弱规范玻色子和轻子的共线分裂是主要现象,因此散射过程应该用电弱部分子分布函数(EW PDF)来描述。我们在标准模型中完成了这一形式,包括QCD扇区,并在双对数精度下计算了轻子内部的夸克和胶子PDF。光子的分裂以及随后的夸克和胶子的分裂控制了EW标度以下的夸克/胶子PDF。大质量规范玻色子在高尺度下产生了巨大的贡献。在TeV c.m.的$e^+e^-$($μ^+μ^-$)碰撞中,喷流产生截面可以达到几个nb(50 pb)量级.具有中等接受截止的能量,其支配高达约$p_T^j \sim 60$ GeV的整体事件形状。

英文摘要:

In high-energy leptonic collisions, such as at a multi-TeV muon collider, the collinear splittings of the electroweak (EW) gauge bosons and leptons are the dominant phenomena, and the scattering processes should thus be formulated in terms of the EW parton distribution functions (EW PDFs). We complete this formalism in the Standard Model to include the QCD sector and evaluate the quark and gluon PDFs inside a lepton at the double-log accuracy. The splittings of the photon and subsequently the quarks and gluons control the quark/gluon PDFs below the EW scale. The massive gauge bosons lead to substantial contributions at high scales. The jet production cross section can reach the order of a few nb (50 pb) in $e^+e^-$ ($μ^+μ^-$) collisions, at the TeV c.m. energies with a moderate acceptance cut, that governs the overall event shape up to about $p_T^j \sim 60$ GeV.

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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