Beam-spin asymmetries in the azimuthal distribution of pion electroproduction

A. Airapetian, H.P. Blok, W.H.A. Hesselink, P.B. van der Nat, S. Wang

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Abstract

A measurement of the beam-spin asymmetry in the azimuthal distribution of pions produced in semi-inclusive deep-inelastic scattering off protons is presented. The measurement was performed using the HERMES spectrometer with a hydrogen gas target and the longitudinally polarized 27.6 GeV positron beam of HERA. The sinusoidal amplitude of the dependence of the asymmetry on the angle φ{symbol} of the hadron production plane around the virtual photon direction relative to the lepton scattering plane was measured for π
Original languageEnglish
Pages (from-to)164-170
JournalPhysics Letters B
Volume648
Issue number2-3
DOIs
Publication statusPublished - 2007

Bibliographical note

Beam-spin asymmetries in the azimuthal distribution of pion electroproduction

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