Three-gluon contribution to the single spin asymmetry for light hadron production in pp collision

Abstract

We study the twist-3 three-gluon contribution to the single spin asymmetry in the light-hadron production in pp collision in the framework of the collinear factorization. We derive the corresponding cross section formula in the leading order with respect to the QCD coupling constant. We also present a numerical calculation of the asymmetry at the RHIC energy, using a model for the three-gluon correlation functions suggested by the asymmetry observed in the $D$-meson production at RHIC.

16 pages, 11figures

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• Single-spin asymmetries in the leptoproduction of transversely polarized $\Lambda$ hyperons
• Exact Relations for Twist-3 Gluon Distribution and Fragmentation Functions from Operator Identities
• Hyperon polarization from the twist-3 distribution in the unpolarized proton-proton collision
• 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
• Transverse spin observables in hard-scattering hadronic processes within collinear factorization
• Transverse single-spin asymmetries of midrapidity ${\pi }^0$ and $\eta$ mesons in polarized $p$$+$$p$ collisions at $\sqrt{s}=200$ GeV
• The $g_T(x)$ contribution to single spin asymmetries in SIDIS
• Electron-Ion Collider impact study on the tensor charge of the nucleon
• Twist-3 Gluon Fragmentation Contribution to Polarized Hyperon Production in Unpolarized Proton-Proton Collision
• Twist-3 effect from the longitudinally polarized proton for $A_{LT}$ in hadron production from $pp$ collisions
• Twist-3 fragmentation effects for $A_{LT}$ in light hadron production from proton-proton collisions
• Transverse Nucleon Single-Spin Asymmetry for Single-Inclusive Hadron and Jet Production at NLO Accuracy
• 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}
• $A_N$ in inclusive lepton-proton collisions: TMD and twist-3 approaches
• Transverse Single-Spin Asymmetries of Midrapidity Direct Photons, Neutral Pions, and Eta Mesons in 200 GeV Polarized Proton-Proton Collisions at PHENIX
• Fragmentation contributions to transverse nucleon spin observables in semi-inclusive deep-inelastic scattering at NLO