Polarization of prompt J/ψ in proton-proton collisions at RHIC

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

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Within the framework of the nonrelativistic QCD (NRQCD) factorization approach, we compute the polarization of prompt J/ψ produced at the Brookhaven's Relativistic Heavy-Ion Collider from proton-proton collisions at the center-of-momentum energy √s=200GeV. The perturbative contributions are computed at leading order in the strong coupling constant. The prediction reveals that the color-singlet contribution severely underestimates the PHENIX preliminary data for the differential cross section integrated over the rapidity range |y|<0.35 and its contribution is strongly transversely polarized, which disagrees with the PHENIX preliminary data. After including the color-octet contributions, we find that the NRQCD predictions for both the cross section and polarization over the transverse-momentum range 1.5GeV<pT<5GeV (1.5GeV<pT<2GeV) integrated over the rapidity range |y|<0.35 (1.2<|y|<2.2) agree with the data within errors.

Original languageEnglish
Article number014020
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume81
Issue number1
DOIs
Publication statusPublished - 2010 Jan 22

Fingerprint

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

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Polarization of prompt J/ψ in proton-proton collisions at RHIC. / Chung, Hee Sok; Yu, Chaehyun; Kim, Seyong; Lee, Jungil.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 81, No. 1, 014020, 22.01.2010.

Research output: Contribution to journalArticle

@article{9d9c2b727e4a41629d9b0fa59425261c,
title = "Polarization of prompt J/ψ in proton-proton collisions at RHIC",
abstract = "Within the framework of the nonrelativistic QCD (NRQCD) factorization approach, we compute the polarization of prompt J/ψ produced at the Brookhaven's Relativistic Heavy-Ion Collider from proton-proton collisions at the center-of-momentum energy √s=200GeV. The perturbative contributions are computed at leading order in the strong coupling constant. The prediction reveals that the color-singlet contribution severely underestimates the PHENIX preliminary data for the differential cross section integrated over the rapidity range |y|<0.35 and its contribution is strongly transversely polarized, which disagrees with the PHENIX preliminary data. After including the color-octet contributions, we find that the NRQCD predictions for both the cross section and polarization over the transverse-momentum range 1.5GeV",
author = "Chung, {Hee Sok} and Chaehyun Yu and Seyong Kim and Jungil Lee",
year = "2010",
month = "1",
day = "22",
doi = "10.1103/PhysRevD.81.014020",
language = "English",
volume = "81",
journal = "Physical review D: Particles and fields",
issn = "0556-2821",
publisher = "American Institute of Physics Publising LLC",
number = "1",

}

TY - JOUR

T1 - Polarization of prompt J/ψ in proton-proton collisions at RHIC

AU - Chung, Hee Sok

AU - Yu, Chaehyun

AU - Kim, Seyong

AU - Lee, Jungil

PY - 2010/1/22

Y1 - 2010/1/22

N2 - Within the framework of the nonrelativistic QCD (NRQCD) factorization approach, we compute the polarization of prompt J/ψ produced at the Brookhaven's Relativistic Heavy-Ion Collider from proton-proton collisions at the center-of-momentum energy √s=200GeV. The perturbative contributions are computed at leading order in the strong coupling constant. The prediction reveals that the color-singlet contribution severely underestimates the PHENIX preliminary data for the differential cross section integrated over the rapidity range |y|<0.35 and its contribution is strongly transversely polarized, which disagrees with the PHENIX preliminary data. After including the color-octet contributions, we find that the NRQCD predictions for both the cross section and polarization over the transverse-momentum range 1.5GeV

AB - Within the framework of the nonrelativistic QCD (NRQCD) factorization approach, we compute the polarization of prompt J/ψ produced at the Brookhaven's Relativistic Heavy-Ion Collider from proton-proton collisions at the center-of-momentum energy √s=200GeV. The perturbative contributions are computed at leading order in the strong coupling constant. The prediction reveals that the color-singlet contribution severely underestimates the PHENIX preliminary data for the differential cross section integrated over the rapidity range |y|<0.35 and its contribution is strongly transversely polarized, which disagrees with the PHENIX preliminary data. After including the color-octet contributions, we find that the NRQCD predictions for both the cross section and polarization over the transverse-momentum range 1.5GeV

UR - http://www.scopus.com/inward/record.url?scp=77649144554&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77649144554&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.81.014020

DO - 10.1103/PhysRevD.81.014020

M3 - Article

AN - SCOPUS:77649144554

VL - 81

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 0556-2821

IS - 1

M1 - 014020

ER -