Sivers function in light-cone quark model and azimuthal spin asymmetries in pion electroproduction

Abstract

We perform a calculation of Sivers function in a light-cone SU(6) quark-diquark model with both scalar diquark and vector diquark spectators. We derive the transverse momentum dependent light-cone wave function of the proton by taking into account the Melosh-Wigner rotation. By adopting one-gluon exchange, we obtain a non-vanishing Sivers function of $down$ quark from interference of proton spin amplitudes. We analyze the $\frac{|P_{h\perp }|}{M}$ weighted Sivers asymmetries in ${\pi }^{+}$, ${\pi }^{-}$ and ${\pi }^0$ electroproduction off transverse polarized proton target, averaged and not averaged by the kinematics of HERMES experiment.

17 LaTex pages, 2 figures. Final version for journal publication

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• Transverse Momentum Dependent Parton Distribution/Fragmentation Functions at an Electron-Ion Collider
• Gluon Sivers function in a light-cone spectator model
• On a possible node in the Sivers and Qiu-Sterman functions
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• Electroweak properties of octet baryons in light-cone quark-diquark model
• Sivers distribution functions of sea quark in proton with chiral Lagrangian
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• Studies of Transverse Momentum Dependent Parton Distributions and Bessel Weighting
• Single Transverse Spin Asymmetries in Semi-inclusive Deep Inelastic Scattering in a Spin-1 Diquark Model
• Six-dimensional light-front Wigner distributions of the proton
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• Effect of sea quarks on single-spin asymmetries $A_N^{W^{\pm }}$ in transversely polarized pp collisions at RHIC
• T-odd distributions, breaking of long range correlations, and sudden entropy changes, in Drell-Yan high-energy processes
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• Extraction of finite-energy contributions to the Sivers asymmetry from the analysis of exclusive proton-proton scattering
• Sivers effect in semi-inclusive DIS and in the Drell-Yan process
• Transverse-Momentum Distributions and Spherical Symmetry
• Leading and higher twist transverse momentum dependent parton distribution functions in the spectator model