3 years ago

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

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

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.

Publisher URL: http://arxiv.org/abs/1801.08443

DOI: arXiv:1801.08443v1

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