Single spin asymmetry in forward $pA$ collisions: Phenomenology at RHIC

Abstract

We confront the theoretical result of single spin asymmetry (SSA) $A_N$ in forward $pA$ collisions $p^{\uparrow }A\to hX$ including the gluon saturation effect with the recent preliminary experimental data from the PHENIX and STAR collaborations at RHIC. While we find overall reasonable agreement with the STAR data, our results indicate that the strong nuclear suppression of the asymmetry $A_N\sim A^{-1/3}$ observed by the PHENIX collaboration cannot be explained within the present understanding of this problem.

v3: minor corrections, matches the published version

References in corpus (14)

• New parton distributions for collider physics
• The Color Glass Condensate
• Parton-to-Pion Fragmentation Reloaded
• Azimuthal and Single Spin Asymmetries in Hard Scattering Processes
• Towards an explanation of transverse single-spin asymmetries in proton-proton collisions: the role of fragmentation in collinear factorization
• Next-to-eikonal corrections in the CGC: gluon production and spin asymmetries in pA collisions
• Probing the three-gluon correlation functions by the single spin asymmetry in p^\uparrow p\to DX
• Phenomenological constraints on $A_N$ in $p^{\uparrow }p\to \pi X$ from Lorentz invariance relations
• Master Formula for the Three-Gluon Contribution to Single Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering
• Sivers asymmetry of Drell-Yan production in small-$x$ regime
• Single spin asymmetry in forward $pA$ collisions II: Fragmentation contribution
• Transverse single spin asymmetry in direct photon production in polarized pA collisions
• Single Spin Asymmetry in Forward $pA$ Collisions
• Single spin asymmetries in forward p-p/A collisions revisited: the role of color entanglement

Cited by in corpus (8)

• Transverse spin effects in hard semi-inclusive collisions
• Exact Relations for Twist-3 Gluon Distribution and Fragmentation Functions from Operator Identities
• Single-spin asymmetries at two loops
• Nuclear dependence of the transverse single-spin asymmetry in the production of charged hadrons at forward rapidity in polarized $p+p$, $p+$Al, and $p+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Lensing Mechanism Meets Small-$x$ Physics: Single Transverse Spin Asymmetry in $p^{\uparrow }+p$ and $p^{\uparrow }+A$ Collisions
• On the odderon mechanism for transverse single spin asymmetry in the Wandzura-Wilczek approximation
• Transverse single-spin asymmetry of charged hadrons at forward and backward rapidity in polarized $p$+$p$, $p$+Al, and $p$+Au collisions at $\sqrt{s_{NN}}=200$ GeV}
• Single spin asymmetry in forward $pA$ collisions from Pomeron-Odderon interference