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Reweighting the Sivers function with jet data from STAR

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arxiv 2101.03955 v1 pith:OR4ZXJMR submitted 2021-01-11 hep-ph hep-ex

classification hep-phhep-ex
keywords datafunctionreweightingsiversquarksidisstarapplied
verification ladder T0 review T1 audit T2 compute T3 formal
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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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