Single Spin Asymmetry through QCD Instantons

Abstract

We revisit the effects of QCD instantons in semi-inclusive deep inelastic scattering (SIDIS). We show that large single spin asymmetry (SSA) effects can be induced in longitudinally and transversely polarized proton targets. The results are in agreement with most of the reported data for pion and kaon production. The same effects are found to be important in polarized proton on proton scattering for both charged and chargeless pion productions. The results agree with the reported data in a wide range of \sqrt{s} = 19.4-200 GeV. We predict the SSA for π^\pm production in p_\uparrow p in the collider range of \sqrt{s} = 62.4-500 GeV. The backward π^{\pm} and π^0 productions for the SSA in p_\uparrow p collisions are predicted to coincide at large \sqrt{s}.

13 pages, 17 figures, Latex

References in corpus (4)

• Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV
• An Observation Concerning the Process Dependence of the Sivers Functions
• Measurement of Single and Double Spin Asymmetries in Deep Inelastic Pion Electroproduction with a Longitudinally Polarized Target
• Determination of polarized parton distribution functions with recent data on polarization asymmetries

Cited by in corpus (14)

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• Fragmentation contribution to the transverse single-spin asymmetry in proton-proton collisions
• A New Mechanism for Generating a Single Transverse Spin Asymmetry
• Transverse single spin asymmetries at small x and the anomalous magnetic moment
• Single-spin asymmetries in inclusive deep inelastic scattering and multiparton correlations in the nucleon
• Confining Dyon-Anti-Dyon Coulomb Liquid Model I
• Analysis of the double-spin asymmetry A_LT in inelastic nucleon-nucleon collisions
• Anomalous Quark Chromomagnetic Moment and Single-Spin Asymmetries
• Transverse spin observables in hard-scattering hadronic processes within collinear factorization
• Spin Physics through QCD Instantons
• Anomalous pion production induced by nontrivial topological structure of QCD vacuum
• Double Spin Asymmetries through QCD Instantons
• P-Odd Pion Azimuthal Charge Correlations in Heavy Ion Collisions
• Instanton induced transverse single spin asymmetry for ${\pi }^0$ production in $pp$-scattering