Color-evaporation-model calculation of e+e-→J/ψ+cc̄+X at s=10.6GeV

Daekyoung Kang, Jong Wan Lee, Jungil Lee, Taewon Kim, Pyungwon Ko

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Measurements by Belle Collaboration of the cross section for inclusive J/ψ production in e+e- annihilation have been a serious challenge to current heavy-quarkonium theory. In particular, the measured cross sections for exclusive J/ψ+ηc and inclusive J/ψ+cc̄+X differ from nonrelativistic QCD predictions by an order of magnitude. In order to check if other available alternative theories can resolve such a large discrepancy, we calculate the cross section for inclusive J/ψ+cc̄+X based on the color-evaporation model. As a phenomenological model, the color-evaporation model is still employed to predict cross sections for inclusive quarkonium production in various processes. Our results show that the color-evaporation- model prediction is even smaller than the nonrelativistic QCD prediction by an order of magnitude. The resultant color-evaporation-model prediction for the J/ψ+cc̄+X fraction in the inclusive J/ψ production cross section is 0.049, while the empirical value measured by Belle Collaboration is 0.82.

Original languageEnglish
Article number094019
Pages (from-to)1-5
Number of pages5
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume71
Issue number9
DOIs
Publication statusPublished - 2005 May 1

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Evaporation
Cross section
evaporation
color
cross sections
predictions
Prediction Model
quantum chromodynamics
Model
Prediction
Annihilation
Discrepancy
Resolve
Color
Calculate
Predict
Alternatives
Collaboration

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

Cite this

Color-evaporation-model calculation of e+e-→J/ψ+cc̄+X at s=10.6GeV. / Kang, Daekyoung; Lee, Jong Wan; Lee, Jungil; Kim, Taewon; Ko, Pyungwon.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 71, No. 9, 094019, 01.05.2005, p. 1-5.

Research output: Contribution to journalArticle

Kang, Daekyoung ; Lee, Jong Wan ; Lee, Jungil ; Kim, Taewon ; Ko, Pyungwon. / Color-evaporation-model calculation of e+e-→J/ψ+cc̄+X at s=10.6GeV. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2005 ; Vol. 71, No. 9. pp. 1-5.
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