Inclusive production of four charm hadrons in e+e- annihilation at B factories

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

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Measurements by the Belle Collaboration of the exclusive production of two charmonia in e+e- annihilation differ substantially from theoretical predictions. Till now, no conclusive explanation for this remarkable discrepancy has been provided. Even the origin of the discrepancy is not identified, yet. We suggest that the measurement of four-charm events in Belle data must provide a strong constraint in identifying the origin of this large discrepancy. Our prediction of the cross section for e+e- → cc̄cc̄, in lowest order in strong coupling constant, at √s = 10.6 GeV is about 0.1 pb. If measured four-charm cross section is compatible with the prediction based on perturbative QCD, it is very likely that factorization of the hadronization process from perturbative part may be significantly violated or there exists a new production mechanism. If the cross section for the four-charm event is also larger than the prediction like that for the exclusive J/ψ + ηc production, perturbative QCD expansion itself will be proved to be unreliable and loses predictive power.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume71
Issue number7
DOIs
Publication statusPublished - 2005 Apr 1

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Annihilation
industrial plants
hadrons
Discrepancy
Cross section
Prediction
predictions
cross sections
quantum chromodynamics
Charmonium
Strong Coupling
factorization
Lowest
Factorization
Likely
expansion

ASJC Scopus subject areas

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

Cite this

Inclusive production of four charm hadrons in e+e- annihilation at B factories. / Kang, Daekyoung; Lee, Jong Wan; Lee, Jungil; Kim, Taewon; Ko, Pyungwon.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 71, No. 7, 01.04.2005, p. 1-4.

Research output: Contribution to journalArticle

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