Polarization of prompt J/ψ in pp→J/ψ+X at √s=200GeV

Hee Sok Chung, Seyong Kim, Jungil Lee, Chaehyun Yu

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Within the framework of the nonrelativistic QCD factorization approach, we compute the cross section and polarization of prompt J/ψ produced from proton-proton collisions at the center-of-momentum energy √s=200GeV. 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 2GeV<pT<20GeV. The perturbative contributions are computed at leading order in the strong coupling constant. We predict slight transverse polarization of J/ψ 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 αs, but disagrees with the result from the leading-order color-singlet model or the s-channel-cut method.

Original languageEnglish
Article number037501
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume83
Issue number3
DOIs
Publication statusPublished - 2011 Feb 11

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transverse momentum
polarization
color
protons
cross polarization
factorization
quantum chromodynamics
kinetic energy
collisions
cross sections
predictions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Polarization of prompt J/ψ in pp→J/ψ+X at √s=200GeV. / Chung, Hee Sok; Kim, Seyong; Lee, Jungil; Yu, Chaehyun.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 83, No. 3, 037501, 11.02.2011.

Research output: Contribution to journalArticle

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