Transverse target single-spin asymmetry in inclusive electroproduction of charged pions and kaons

Abstract

Single-spin asymmetries were investigated in inclusive electroproduction of charged pions and kaons from transversely polarized protons at the HERMES experiment. The asymmetries were studied as a function of the azimuthal angle $\psi$ about the beam direction between the target-spin direction and the hadron production plane, the transverse hadron momentum relative to the direction of the incident beam, and the Feynman variable $x_F$. The $\sin (\psi )$ amplitudes are positive for positive pions and kaons, slightly negative for negative pions and consistent with zero for negative kaons, with particular transverse-momentum but weak $x_F$ dependences. Especially large asymmetries are observed for two small subsamples of events, where also the scattered electron was recorded by the spectrometer.

10 pages, 5 figures

References in corpus (18)

• Matches and mismatches in the descriptions of semi-inclusive processes at low and high transverse momentum
• A Unified Picture for Single Transverse-Spin Asymmetries in Hard Processes
• Multiplicities of charged pions and kaons from semi-inclusive deep-inelastic scattering by the proton and the deuteron
• Single transverse-spin asymmetry in high transverse momentum pion production in pp collisions
• PYTHIA 6.3 Physics and Manual
• Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV
• Experimental investigation of transverse spin asymmetries in muon-p SIDIS processes: Sivers asymmetries
• Twist-3 Formalism for Single Transverse Spin Asymmetry Reexamined: Semi-Inclusive Deep Inelastic Scattering
• Single Transverse Spin Asymmetries of Identified Charged Hadrons in Polarized p+p Collisions at $\sqrt{s}$ = 62.4 GeV
• Single-Transverse Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering
• Collins Fragmentation and the Single Transverse Spin Asymmetry
• Single Transverse Spin Asymmetry for Large-p_T Pion Production in Semi-Inclusive Deep Inelastic Scattering
• Production of Mesons and Baryons at High Rapidity and High Pt in Proton-Proton Collisions at sqrt(s) = 200 GeV
• Single-spin asymmetries in inclusive deep inelastic scattering and multiparton correlations in the nucleon
• Measurement of Transverse Single-Spin Asymmetries for J/psi Production in Polarized p+p Collisions at sqrt(s) = 200 GeV
• Exclusive rho-0 electroproduction on transversely polarized protons
• Single Transverse-Spin Asymmetry in Very Forward and Very Backward Neutral Particle Production for Polarized Proton Collisions at sqrt{s} = 200 GeV
• On the Relation Between Mechanisms for Single-Transverse-Spin Asymmetries

Cited by in corpus (2)

• Longitudinal-transverse double-spin asymmetries in single-inclusive leptoproduction of hadrons
• Transverse spin observables in hard-scattering hadronic processes within collinear factorization