# 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.
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Journal articles
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http://hal.in2p3.fr/in2p3-00877302
Contributor : Sophie Heurteau <>
Submitted on : Monday, October 28, 2013 - 11:13:13 AM
Last modification on : Wednesday, September 16, 2020 - 4:08:31 PM

### Citation

A. Airapetian, N. Akopov, Z. Akopov, E. C. Aschenauer, W. Augustyniak, et al.. Transverse target single-spin asymmetry in inclusive electroproduction of charged pions and kaons. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier, 2014, 728, pp.183-190. ⟨10.1016/j.physletb.2013.11.021⟩. ⟨in2p3-00877302⟩

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