Transverse momentum dependence of J/ψ polarization at midrapidity in p+p collisions at √s=200 GeV - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review D Year : 2010

Transverse momentum dependence of J/ψ polarization at midrapidity in p+p collisions at √s=200 GeV

Abstract

We report the measurement of the transverse momentum dependence of inclusive J/ψ polarization in p+p collisions at √s=200 GeV performed by the PHENIX Experiment at the Relativistic Heavy Ion Collider. The J/ψ polarization is studied in the helicity, Gottfried-Jackson, and Collins-Soper frames for pT<5 GeV/c and |y|<0.35. The polarization in the helicity and Gottfried-Jackson frames is consistent with zero for all transverse momenta, with a slight (1.8 sigma) trend towards longitudinal polarization for transverse momenta above 2 GeV/c. No conclusion is allowed due to the limited acceptance in the Collins-Soper frame and the uncertainties of the current data. The results are compared to observations for other collision systems and center of mass energies and to different quarkonia production models.
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Dates and versions

in2p3-00760878 , version 1 (04-12-2012)

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  • HAL Id : in2p3-00760878 , version 1

Cite

A. Adare, M. P. Comets, D. Jouan, C. Suire, G. Roche, et al.. Transverse momentum dependence of J/ψ polarization at midrapidity in p+p collisions at √s=200 GeV. Physical Review D, 2010, 10.1103/PhysRevD.82.012001, pp.012001. ⟨in2p3-00760878⟩
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