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arXiv · 1801.08443

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

Cristian Pisano·Alessandro Bacchetta·Filippo Delcarro·Marco Radici·Andrea Signori
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Abstract

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.

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Cristian Pisano, Alessandro Bacchetta, Filippo Delcarro, Marco Radici, Andrea Signori. 2018-01-25. A first determination of the unpolarized quark TMDs from a global analysis. https://arxiv.org/abs/1801.08443

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