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Simultaneous reweighting of Transverse Momentum Dependent distributions

High Energy Physics - Phenomenology 2024-05-17 v2 High Energy Physics - Experiment High Energy Physics - Theory Nuclear Theory

Abstract

The Bayesian reweighting procedure is extended to the case of multiple independent extractions of transverse momentum dependent parton distributions (TMDs). By exploiting the data on transverse single spin asymmetries, ANA_N, for inclusive pion production in polarized proton-proton collisions measured at RHIC, we perform a simultaneous reweighting of the quark Sivers, transversity and Collins TMD functions extracted from semi-inclusive deep inelastic scattering (SIDIS) and e+ee^+ e^- annihilation into hadron pairs. The impact of the implementation of the Soffer bound, as well as the differences between older and newer ANA_N data, are investigated. The agreement with ANA_N data at large-xFx_F values, a kinematical region complementary to those explored in SIDIS measurements, is enhanced, improving the knowledge of the polarized quark TMDs in the large-xx region.

Keywords

Cite

@article{arxiv.2402.12322,
  title  = {Simultaneous reweighting of Transverse Momentum Dependent distributions},
  author = {Mariaelena Boglione and Umberto D'Alesio and Carlo Flore and Josè Osvaldo Gonzalez-Hernandez and Francesco Murgia and Alexei Prokudin},
  journal= {arXiv preprint arXiv:2402.12322},
  year   = {2024}
}

Comments

11 pages, 11 figures. Revised results section, extended discussion on Bayesian reweighting. To appear on Physics Letters B