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arXiv 1801.08443hep-ph
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从整体分析首次确定非极化夸克TMD

A first determination of the unpolarized quark TMDs from a global analysis

Cristian Pisano, Alessandro Bacchetta, Filippo Delcarro, Marco Radici, Andrea Signori

摘要:

通过同时分析半包容的深度非弹性散射、Drell-Yan和$Z$玻色子强子产生过程,首次提取了非极化质子内部非极化夸克的横动量相关分布和碎裂函数.这项研究是在微扰QCD的领先秩序,与下一个领先的对数精度的能量标度演化。此外,一些特定的选择,以处理低尺度的演变约1 GeV的$^2$。由于只考虑了低横向动量区域的数据,因此不需要与高横向动量下的固定阶计算相匹配。

英文摘要:

Transverse momentum dependent distribution and fragmentation functions of unpolarized quarks inside unpolarized protons are extracted, for the first time, through a simultaneous analysis of semi-inclusive deep-inelastic scattering, Drell-Yan and $Z$ boson hadroproduction processes. This study is performed at leading order in perturbative QCD, with energy scale evolution at the next-to-leading logarithmic accuracy. Moreover, some specific choices are made to deal with low scale evolution around 1 GeV$^2$. Since only data in the low transverse momentum region are considered, no matching to fixed-order calculations at high transverse momentum is needed.

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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