Cross section and transverse single-spin asymmetry of η mesons in p↑+p collisions at s√=200  GeV at forward rapidity

Adare, A. and Makek, Mihael and Zhou, S. (PHENIX Collaboration) (2014) Cross section and transverse single-spin asymmetry of η mesons in p↑+p collisions at s√=200  GeV at forward rapidity. Physical Review D, 90 (7). pp. 72008-15. ISSN 1550-7998

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Abstract

We present a measurement of the cross section and transverse single-spin asymmetry (AN) for η mesons at large pseudorapidity from √s=200  GeV p↑+p collisions. The measured cross section for 0.5<pT<5.0  GeV/c and 3.0<|η|<3.8 is well described by a next-to-leading-order perturbative-quantum-chromodynamics calculation. The asymmetries AN have been measured as a function of Feynman-x (xF) from 0.2<|xF|<0.7, as well as transverse momentum (pT) from 1.0<pT<4.5  GeV/c. The asymmetry averaged over positive xF is ⟨AN⟩=0.061±0.014. The results are consistent with prior transverse single-spin measurements of forward η and π0 mesons at various energies in overlapping xF ranges. Comparison of different particle species can help to determine the origin of the large observed asymmetries in p↑+p collisions.

Item Type: Article
Date: October 2014
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2014) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 25 Nov 2014 11:45
Last Modified: 25 Nov 2014 11:45
URI: http://digre.pmf.unizg.hr/id/eprint/3358

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