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25 April 2024

» arxiv » 1310.5070

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Transverse target single-spin asymmetry in inclusive electroproduction of charged pions and kaons
HERMES Collaboration ; A. Airapetian ; N. Akopov ; Z. Akopov ; E.C. Aschenauer ; W. Augustyniak ; R. Avakian ; A. Avetissian ; E. Avetisyan ; S. Belostotski ; N. Bianchi ; H.P. Blok ; A. Borissov ; J. Bowles ; V. Bryzgalov ; J. Burns ; M. Capiluppi ; G.P. Capitani ; E. Cisbani ; G. Ciullo ; M. Contalbrigo ; P.F. Dalpiaz ; W. Deconinck ; R. De Leo ; L. De Nardo ; E. De Sanctis ; M. Diefenthaler ; P. Di Nezza ; M. Düren ; M. Ehrenfried ; G. Elbakian ; F. Ellinghaus ; R. Fabbri ; A. Fantoni ; L. Felawka ; S. Frullani ; D. Gabbert ; G. Gapienko ; V. Gapienko ; G. Gavrilov ; V. Gharibyan ; F. Giordano ; S. Gliske ; M. Golembiovskaya ; C. Hadjidakis ; M. Hartig ; D. Hasch ; A. Hillenbrand ; M. Hoek ; Y. Holler ; I. Hristova ; A. Ivanilov ; H.E. Jackson ; S. Joosten ; R. Kaiser ; G. Karyan ; T. Keri ; E. Kinney ; A. Kisselev ; V. Korotkov ; V. Kozlov ; P. Kravchenko ; V.G. Krivokhijine ; L. Lagamba ; L. Lapikás ; I. Lehmann ; P. Lenisa ; A. López Ruiz ; W. Lorenzon ; B.-Q. Ma ; D. Mahon ; N.C.R. Makins ; S.I. Manaenkov ; Y. Mao ; B. Marianski ; A. Martinez de la Ossa ; H. Marukyan ; C.A. Miller ; Y. Miyachi ; A. Movsisyan ; V. Muccifora ; M. Murray ; A. Mussgiller ; E. Nappi ; Y. Naryshkin ; A. Nass ; M. Negodaev ; W.-D. Nowak ; L.L. Pappalardo ; R. Perez-Benito ; A. Petrosyan ; M. Raithel ; P.E. Reimer ; A.R. Reolon ; C. Riedl ; K. Rith ; G. Rosner ; A. Rostomyan ; J. Rubin ; D. Ryckbosch ; Y. Salomatin ; F. Sanftl ; A. Schäfer ; G. Schnell ; B. Seitz ; T.-A. Shibata ; V. Shutov ; M. Stancari ; M. Statera ; E. Steffens ; J.J.M. Steijger ; J. Stewart ; F. Stinzing ; S. Taroian ; A. Terkulov ; R. Truty ; A. Trzcinski ; M. Tytgat ; Y. Van Haarlem ; C. Van Hulse ; D. Veretennikov ; V. Vikhrov ; I. Vilardi ; S. Wang ; S. Yaschenko ; Z. Ye ; S. Yen ; W. Yu ; V. Zagrebelnyy ; D. Zeiler ; B. Zihlmann ; P. Zupranski ;
Date:	18 Oct 2013
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.
Source:	arXiv, 1310.5070
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