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Physical Review D

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Three-gluon contribution to the single spin asymmetry for light hadron production in $p p$ collision

Hiroo Beppu¹, Koichi Kanazawa^1,2, Yuji Koike³, and Shinsuke Yoshida^4,5

¹Graduate School of Science and Technology, Niigata University, Ikarashi, Niigata 950-2181, Japan
²Department of Physics, Temple University, Barton Hall, Philadelphia, Pennsylvania 19122, USA
³Department of Physics, Niigata University, Ikarashi, Niigata 950-2181, Japan
⁴Theoretical Research Division, Nishina Center, RIKEN, Wako 351-0198, Japan
⁵Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA

Phys. Rev. D 89, 034029 – Published 28 February, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.034029

Abstract

We study the twist-3 three-gluon contribution to the single spin asymmetry in the light-hadron production in pp collision in the framework of the collinear factorization. We derive the corresponding cross-section formula in the leading order with respect to the QCD coupling constant. We also present a numerical calculation of the Relativistic Heavy Ion collider (RHIC) energy, using a model for the three-gluon correlation functions suggested by the asymmetry observed in the $D$ -meson production at the RHIC.

Article Text

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