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arXiv · 2210.01733

Extraction of Pion Transverse Momentum Distributions from Drell-Yan data

Matteo Cerutti·Lorenzo Rossi·Simone Venturini·Alessandro Bacchetta·Valerio Bertone·Chiara Bissolotti·Marco Radici
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Abstract

We map the distribution of unpolarized quarks inside a unpolarized pion as a function of the quark's transverse momentum, encoded in unpolarized Transverse Momentum Distributions (TMDs). We extract the pion TMDs from available data of unpolarized pion-nucleus Drell-Yan processes, where the cross section is differential in the lepton-pair transverse momentum. In the cross section, pion TMDs are convoluted with nucleon TMDs that we consistently take from our previous studies. We obtain a fairly good agreement with data. We present also predictions for pion-nucleus scattering that is being measured by the COMPASS Collaboration.

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Matteo Cerutti, Lorenzo Rossi, Simone Venturini, Alessandro Bacchetta, Valerio Bertone, Chiara Bissolotti, Marco Radici. 2022-10-04. Extraction of Pion Transverse Momentum Distributions from Drell-Yan data. https://doi.org/10.1103/physrevd.107.014014

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