Beam-Spin Azimuthal Asymmetries in Pion Electroproduction at HERMES

HERMES Collaboration; E. Avetisyan

Beam-Spin Azimuthal Asymmetries in Pion Electroproduction at HERMES

High Energy Physics - Experiment 2012-08-03 v2

Authors: HERMES Collaboration , E. Avetisyan

Abstract

We present the measurement of Single Beam-Spin Azimuthal Asymmetries in pion electroproduction off hydrogen in semi-inclusive deep inelastic scattering (SIDIS). The measurement was made using the HERMES spectrometer with an internal gas target and the polarized 27.6 GeV electron(positron) beam of HERA using the data taken during the years 1996-2000. The $\sin\phi$ modulation of the azimuthal asymmetry was measured for semi-inclusive $\pi^+,\pi^-$ and $\pi^0$ . The dependence of the asymmetry on the Bjorken $x$ , pion relative ( $z$ ) and transverse ( $P_T$ ) momentum is presented. Results are compared to theoretical model calculation.

Keywords

beam-spin asymmetry pion electroproduction SIDIS HERMES azimuthal asymmetry

Cite

@article{arxiv.hep-ex/0408002,
  title  = {Beam-Spin Azimuthal Asymmetries in Pion Electroproduction at HERMES},
  author = {HERMES Collaboration and E. Avetisyan},
  journal= {arXiv preprint arXiv:hep-ex/0408002},
  year   = {2012}
}

Comments

To appear in the proceedings of the 12th International Workshop on Deep Inelastic Scattering and QCD, Strbske Pleso, High Tatras, Slovakia, Apr 14 - 18, 2004

Beam-Spin Azimuthal Asymmetries in Pion Electroproduction at HERMES

Abstract

Keywords

Cite

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