2010
DOI: 10.1103/physrevd.82.012001
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Transverse momentum dependence ofJ/ψpolarization at midrapidity inp+pcollisions ats=200

Abstract: We report the measurement of the transverse momentum dependence of inclusive J=c polarization in p þ p collisions at ffiffi ffi s p ¼ 200 GeV performed by the PHENIX Experiment at the Relativistic Heavy IonCollider. The J=c polarization is studied in the helicity, Gottfried-Jackson, and Collins-Soper frames for p T < 5 GeV=c and jyj < 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 polar… Show more

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Cited by 71 publications
(25 citation statements)
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“…2 that our NLO NRQCD predictions nicely describe the p T distributions from PHENIX [18] (a) and CMS [19] (b) as well as the W distributions from H1 [14,17] (c), with most of the data points falling inside the yellow (shaded) error band. In all these cases, inclusion of the NLO corrections tends to improve the agreement.…”
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confidence: 89%
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“…2 that our NLO NRQCD predictions nicely describe the p T distributions from PHENIX [18] (a) and CMS [19] (b) as well as the W distributions from H1 [14,17] (c), with most of the data points falling inside the yellow (shaded) error band. In all these cases, inclusion of the NLO corrections tends to improve the agreement.…”
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confidence: 89%
“…We thank G. Kramer for useful discussions and B. Jacak and C. Luiz da Silva for help with the comparison to the PHENIX data [18]. This work was supported in part by BMBF Grant No.…”
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confidence: 95%
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“…The polarization for inclusive J / ψ production (including the feed-down from higher charmonium states) in hadronic interactions has been measured by several experiments at Fermilab [22], Brookhaven [23] and DESY [24]. The CDF experiment, in collisions at , measured a small longitudinal J / ψ polarization, going to zero at small p T .…”
Section: Introductionmentioning
confidence: 99%