Extraction of pion transverse momentum distributions from Drell-Yan data

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 sec...

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Bibliographic Details
Published in:Physical review. D 2023-01, Vol.107 (1), Article 014014
Main Authors: Cerutti, Matteo, Rossi, Lorenzo, Venturini, Simone, Bacchetta, Alessandro, Bertone, Valerio, Bissolotti, Chiara, Radici, Marco
Format: Article
Language:English
Subjects:
ASTRONOMY AND ASTROPHYSICS
parton distribution functions
phenomenology
pions
QCD phenomenology
quantum chromodynamics
strong interaction
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Summary: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.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.107.014014