Polarization of prompt J/{psi} in pp{yields}J/{psi}+X at {radical}(s)=200 GeV

Journal Article · Tue Feb 01 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.037501· OSTI ID:21504935

Chung, Hee Sok; Lee, Jungil ^[1]; Kim, Seyong ^[2]; Yu, Chaehyun ^[3]

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1. Department of Physics, Korea University, Seoul 136-701 (Korea, Republic of)
2. Department of Physics, Sejong University, Seoul 143-747 (Korea, Republic of)
3. School of Physics, Korea Institute for Advanced Study, Seoul 130-722 (Korea, Republic of)

Within the framework of the nonrelativistic QCD factorization approach, we compute the cross section and polarization of prompt J/{psi} produced from proton-proton collisions at the center-of-momentum energy {radical}(s)=200 GeV. We present the transverse-momentum distribution in the forward-rapidity region 1.2<|y|<2.2 and the rapidity distribution over the transverse-momentum range 2 GeV<p{sub T}<20 GeV. The perturbative contributions are computed at leading order in the strong coupling constant. We predict slight transverse polarization of J/{psi} in the forward-rapidity region, while that for the midrapidity region is slightly longitudinal. The transverse-momentum distribution agrees well with the PHENIX preliminary data and the color-singlet-model prediction at next-to-leading order in {alpha}{sub s}, but disagrees with the result from the leading-order color-singlet model or the s-channel-cut method.

• OSTI ID: 21504935
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 3; Other Information: DOI: 10.1103/PhysRevD.83.037501; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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