Analysis of gluon polarisation for single hadron production with high-pT hadrons in the low Q2

ORAL

Abstract

We present recent COMPASS result on gluon polarisation. We recently analysed longitudinal double spin asymmetry $A_{LL}(p_T)$ for single hadron production with high-$p_T$ hadrons in the low $Q^2$ regime using all COMPASS data. LiD and NH3 were used as polarized deuteron and proton targets. The asymmetries, which are almost consistent with zero, are compared to theoretical predictions with various $\Delta G$ hypotheses.

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Authors

  • Hiroki Matsuda

    • Yamagata University

  • Takahiro Iwata

    • Yamagata University

  • Shigeru Ishimoto

    • KEK

  • Hajime Suzuki

    • Chubu University

  • Norihiro Doshita

    • Yamagata University

  • Genki Nukazuka

    • Yamagata University

  • Naoaki Horikawa

    • Chubu University

  • Tatsuro Matsuda

    • Miyazaki University

  • Kaori Kondo

    • Yamagata University

  • Yoshiyuki Miyachi

    • Yamagata University