Journal
PHYSICS LETTERS B
Volume 728, Issue -, Pages 183-190Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2013.11.021
Keywords
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Funding
- Ministry of Economy
- Ministry of Education and Science of Armenia
- FWO-Flanders
- IWT, Belgium
- Natural Sciences and Engineering Research Council of Canada
- National Natural Science Foundation of China
- Alexander von Humboldt Stiftung
- German Bundesministerium fur Bildung und Forschung (BMBF)
- Deutsche Forschungsgemeinschaft (DFG)
- Italian Istituto Nazionale di Fisica Nucleare (INFN)
- MEXT
- JSPS
- G-COE of Japan
- Dutch Foundation for Fundamenteel Onderzoek der Materie (FOM)
- Russian Academy of Science
- Russian Federal Agency for Science and Innovations
- Basque Foundation for Science (IKERBASQUE)
- UPV/EHU [UFI 11/55]
- U.K. Engineering and Physical Sciences Research Council
- Science and Technology Facilities Council
- Scottish Universities Physics Alliance
- U.S. Department of Energy (DOE)
- National Science Foundation (NSF)
- European Community Research Infrastructure Integrating Activity [283286]
- STFC [ST/J000175/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J000175/1] Funding Source: researchfish
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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 P-T relative to the direction of the incident beam, and the Feynman variable x(F). The sin psi* amplitudes are positive for pi(+) and K+ slightly negative for pi(-) and consistent with zero for K-, with particular P-T 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. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.
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