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arXiv · 2101.03955

Reweighting the Sivers function with jet data from STAR

Mariaelena Boglione·Umberto D'Alesio·Carlo Flore·Josè Osvaldo Gonzalez-Hernandez·Francesco Murgia·Alexei Prokudin
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Abstract

The reweighting procedure that using Bayesian statistics incorporates the information contained in a new data set, without the need of re-fitting, is applied to the quark Sivers function extracted from Semi-Inclusive Deep Inelastic Scattering (SIDIS) data. We exploit the recently published single spin asymmetry data for the inclusive jet production in polarized $pp$ collisions from the STAR Collaboration at RHIC, which cover a much wider $x$ region compared to SIDIS measurements. The reweighting method is extended to the case of asymmetric errors and the results show a remarkable improvement of the knowledge of the quark Sivers function.

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Mariaelena Boglione, Umberto D'Alesio, Carlo Flore, Josè Osvaldo Gonzalez-Hernandez, Francesco Murgia, Alexei Prokudin. 2021-01-11. Reweighting the Sivers function with jet data from STAR. https://doi.org/10.1016/j.physletb.2021.136135

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