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arXiv · 2107.13311

Reweighting the quark Sivers function with STAR jet data

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

The Bayesian reweighting procedure is applied for the first time to a TMD distribution, the quark Sivers function extracted from SIDIS data. By exploiting the recent published single spin asymmetry data for the inclusive jet production in $p^\uparrow p$ collisions from the STAR collaboration at RHIC, we show how such a procedure allows to incorporate the information contained in the new data set, without the need of re-fitting, and to explore a much wider $x$ region compared to SIDIS measurements. The reweighting method is also extended to the case of asymmetric errors, and the results show a significant improvement on the knowledge of the quark Sivers function.

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Carlo Flore, Maria Elena Boglione, Umberto D'Alesio, Josè Osvaldo Gonzalez-Hernandez, Francesco Murgia, Alexei Prokudin. 2021-07-28. Reweighting the quark Sivers function with STAR jet data. https://arxiv.org/abs/2107.13311

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