Extracting the Sivers function from polarized SIDIS data and making predictions

Abstract

The most recent data on the weighted transverse single spin asymmetry $A_{UT}^{\sin ({\varphi }_h-{\varphi }_S)}$ from HERMES and COMPASS collaborations are analysed within LO parton model with unintegrated parton distribution and fragmentation functions; all transverse motions are taken into account, with exact kinematics, in the elementary interactions. The overall quality of the data is such that, for the first time, a rather well constrained extraction of the Sivers function for $u$ and $d$ quarks is possible and is performed. Comparisons with models are made. Based on the extracted Sivers functions, predictions for $A_{UT}^{\sin ({\varphi }_h-{\varphi }_S)}$ asymmetries at JLab are given; suggestions for further measurements at COMPASS, with a transversely polarized hydrogen target and selecting favourable kinematical ranges, are discussed. Predictions are also presented for Single Spin Asymmetries (SSA) in Drell-Yan processes at RHIC and GSI.

18 pages, 10 figures, version published in PRD, one figure and comments added

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Cited by in corpus (140)

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• A new measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target
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• Understanding the large-distance behavior of transverse-momentum-dependent parton densities and the Collins-Soper evolution kernel
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• Sivers and Boer-Mulders observables from lattice QCD
• An Observation Concerning the Process Dependence of the Sivers Functions
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• TMD Evolution: Matching SIDIS to Drell-Yan and W/Z Boson Production
• First measurement of transverse-spin-dependent azimuthal asymmetries in the Drell-Yan process
• Transverse Quark Spin Effects and the Flavor Dependence of the Boer-Mulders Function
• A strategy towards the extraction of the Sivers function with TMD evolution
• Evolution of twist-3 multi-parton correlation functions relevant to single transverse-spin asymmetry
• General partonic structure for hadronic spin asymmetries
• Gluon TMD in particle production from low to moderate x
• QCD Resummation for Single Spin Asymmetries
• Azimuthal distributions of charged hadrons, pions, and kaons produced in deep-inelastic scattering off unpolarized protons and deuterons
• Soft-fermion-pole contribution to single-spin asymmetry for pion production in pp collisions
• Precision Studies of QCD in the Low Energy Domain of the EIC
• Semi-Inclusive Deep Inelastic Scattering processes from small to large P_T
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• Collins effect in semi-inclusive deeply inelastic scattering and in electron positron annihilation
• Energy Evolution for the Sivers Asymmetries in Hard Processes
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• Probing the gluon Sivers function in $p^{\uparrow }p\to J/\psi X$ and $p^{\uparrow }p\to DX$
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• Evidence for the Absence of Gluon Orbital Angular Momentum in the Nucleon
• The Sivers single-spin asymmetry in photon-jet production
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• Collinear matching for Sivers function at next-to-leading order
• Exploring the structure of the proton through polarization observables in l p \to jet X
• N${}^3$LO extraction of the Sivers function from SIDIS, Drell-Yan, and $W^{\pm }/Z$ data
• Model calculations of the Sivers function satisfying the Burkardt Sum Rule
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• Updating Boer-Mulders functions from unpolarized pd and pp Drell-Yan data
• Checking the Burkardt sum rule for the Sivers function by model calculations
• Constraints on the gluon Sivers distribution via transverse single spin asymmetries at midrapidity in p(transv. polarized) p -> pi^0 X processes at BNL RHIC
• TMD Fragmentation Functions at N${}^3$LO
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• Neutron single spin asymmetries from semi-inclusive deep inelastic scattering off transversely polarized ${}^3$He
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• Partonic Transverse Motion in Unpolarized Semi-Inclusive Deep Inelastic Scattering Processes
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• ECCE Sensitivity Studies for Single Hadron Transverse Single Spin Asymmetry Measurements
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• Azimuthal asymmetries in $p^{\uparrow }p\to \mathrm{jet}\pi X$
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• The neutron transversity from semi-inclusive DIS off 3He