Soft-fermion-pole contribution to single-spin asymmetry for pion production in pp collisions

Abstract

We study the single transverse spin asymmetry for the inclusive pion production in the nucleon-nucleon collision, p^\uparrow p\toπX, based on the twist-3 mechanism in the collinear factorization. We derive the soft-fermion-pole (SFP) contribution to the twist-3 single-spin-dependent cross section associated with the twist-3 quark-gluon correlation functions in the polarized nucleon. We find that the SFP can give rise to a large effect to the asymmetry A_N owing to the large partonic hard cross sections with the large color factor, if the SFP function has a similar magnitude as the soft-gluon-pole (SGP) function, in spite of the absence of the "derivative term" for the SFP function unlike for the SGP function.

16 pages, 9 figures, some references added, slight modification in discussions

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• Sivers effect in Drell-Yan processes
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Cited by in corpus (64)

• Parton Fragmentation Functions
• An Observation Concerning the Process Dependence of the Sivers Functions
• Origin of single transverse-spin asymmetries in high-energy collisions
• 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
• Contribution of Twist-3 Multi-Gluon Correlation Functions to Single Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering
• 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
• Towards a first estimate of the gluon Sivers function from $A_N$ data in $pp$ collisions at RHIC
• Contribution of twist-3 fragmentation function to single transverse-spin asymmetry in semi-inclusive deep inelastic scattering
• Process dependent Sivers function and implications for single spin asymmetry in inclusive hadron production
• New Analysis of the Single Transverse-Spin Asymmetry for Hadron Production at RHIC
• On the role of Collins effect in the single spin asymmetry A_N in p(transv. polarized) p --> h X processes
• Probing the three-gluon correlation functions by the single spin asymmetry in p^\uparrow p\to DX
• Global fitting of single spin asymmetry: an attempt
• A phenomenological study of single transverse-spin asymmetry for inclusive light-hadron productions at RHIC
• Exploring the structure of the proton through polarization observables in l p \to jet X
• Transverse spin effects in hard semi-inclusive collisions
• Three-gluon contribution to the single spin asymmetry for light hadron production in pp collision
• QCD evolution of naive-time-reversal-odd fragmentation functions
• Updated QCD global analysis of single transverse-spin asymmetries I: Extracting $\tilde{H}$, and the role of the Soffer bound and lattice QCD
• Phenomenological constraints on $A_N$ in $p^{\uparrow }p\to \pi X$ from Lorentz invariance relations
• Twist-three relations of gluonic correlators for the transversely polarized nucleon
• Three-gluon contribution to the single spin asymmetry in Drell-Yan and direct-photon processes
• Transverse Spin Structure of the Nucleon
• Single spin asymmetries in l p --> h X processes: a test of factorization
• Left-right spin asymmetry in $\ell N^{\uparrow }\to hX$
• Transverse single spin asymmetry in hadronic ${\eta }_{c,b}$ production
• Longitudinal-transverse double-spin asymmetries in single-inclusive leptoproduction of hadrons
• Master Formula for the Three-Gluon Contribution to Single Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering
• Polarized hyperon production in single-inclusive electron-positron annihilation at next-to-leading order
• Twist-3 fragmentation contribution to polarized hyperon production in unpolarized hadronic collisions
• Transverse single-spin asymmetries in $p^{\uparrow }p\to \gamma X$ from quark-gluon-quark correlations in the proton
• Analysis of the double-spin asymmetry A_LT in inelastic nucleon-nucleon collisions
• Double spin asymmetry A_{LT} in direct photon production
• Exact Relations for Twist-3 Gluon Distribution and Fragmentation Functions from Operator Identities
• Single-spin asymmetries in the leptoproduction of transversely polarized $\Lambda$ hyperons
• Transverse spin asymmetries for W-production in proton-proton collisions
• Single Spin Asymmetry in Forward $pA$ Collisions
• Single transverse-spin asymmetry for direct-photon and single-jet productions at RHIC
• Soft-Gluon-Pole Contribution in Single Transverse-Spin Asymmetries of Drell-Yan Processes
• Quark-gluon correlation functions relevant to single transverse spin asymmetries
• Hyperon polarization from the twist-3 distribution in the unpolarized proton-proton collision
• Transverse spin observables in hard-scattering hadronic processes within collinear factorization
• 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
• Hard- and soft-fermion-pole contributions to single transverse-spin asymmetry for Drell-Yan process
• One-Loop Corrections of Single Spin Asymmetries at Twist-3 in Drell-Yan Processes
• 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
• Transverse Polarization of Hyperons Produced in Semi-Inclusive Deep Inelastic Scattering
• 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
• Single Transverse-Spin Asymmetry in Large $P_T$ Open Charm Production at an Electron-Ion Collider
• Transverse single-spin asymmetries in proton-proton collisions at the AFTER@LHC experiment
• Collinear Factorization for Single Transverse-Spin Asymmetry in Drell-Yan Processes
• Transverse Nucleon Single-Spin Asymmetry for Single-Inclusive Hadron and Jet Production at NLO Accuracy
• QCD Evolutions of Twist-3 Chirality-Odd Operators
• 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}
• SPIN Effects, QCD, and Jefferson Laboratory with 12 GeV electrons
• On the contribution of twist-3 multi-gluon correlation functions to single transverse-spin asymmetry in SIDIS
• $A_N$ in inclusive lepton-proton collisions: TMD and twist-3 approaches
• Transverse momentum dependent quark distributions and polarized Drell-Yan processes
• A new twist-3 analysis of the single transverse-spin asymmetry for pion and kaon production at RHIC
• Transverse Single-Spin Asymmetries of Midrapidity Direct Photons, Neutral Pions, and Eta Mesons in 200 GeV Polarized Proton-Proton Collisions at PHENIX