Single spin asymmetry in forward $pA$ collisions II: Fragmentation contribution

Abstract

We compute the twist-three fragmentation contribution to the transverse single spin asymmetry (SSA) in light hadron production $p^{\uparrow }p\to hX$ and $p^{\uparrow }A\to hX$ including the gluon saturation effect in the unpolarized nucleon/nucleus. Together with the results in our previous paper, this completes the full evaluation of the SSA in this process in the "hybrid" formalism. We argue that the dependence of SSAs on the atomic mass number in the forward region can elucidate the relative importance of the soft gluon pole contribution from the twist-three quark-gluon-quark correlation in the polarized nucleon and the twist-three fragmentation contribution from the final state hadron.

arXiv comment11 pages, 2 figures

References in corpus (15)

• Fragmentation of Transversely Polarized Quarks Probed in Transverse Momentum Distributions
• Towards an explanation of transverse single-spin asymmetries in proton-proton collisions: the role of fragmentation in collinear factorization
• Fragmentation contribution to the transverse single-spin asymmetry in proton-proton collisions
• The RHIC SPIN Program: Achievements and Future Opportunities
• Twist-three Fragmentation Function Contribution to the Single Spin Asymmetry in pp Collisions
• Operator Constraints for Twist-3 Functions and Lorentz Invariance Properties of Twist-3 Observables
• A New Mechanism for Generating a Single Transverse Spin Asymmetry
• Contribution of twist-3 fragmentation function to single transverse-spin asymmetry in semi-inclusive deep inelastic scattering
• Transverse-Momentum-Dependent Gluon Distributions and Semi-inclusive Processes at Hadron Colliders
• Single Spin Asymmetry Scaling in the Forward Rapidity Region at RHIC
• Single transverse-spin asymmetries in forward pion production at high energy: incorporating small-x effects in the target
• Transverse single spin asymmetry in direct photon production in polarized pA collisions
• Single Spin Asymmetry in Forward $pA$ Collisions
• Transverse spin observables in hard-scattering hadronic processes within collinear factorization
• Transverse single spin asymmetry in Drell-Yan production in polarized pA collisions

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• Lensing Mechanism Meets Small-$x$ Physics: Single Transverse Spin Asymmetry in $p^{\uparrow }+p$ and $p^{\uparrow }+A$ Collisions
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