Quarkonium-hadron interactions in perturbative QCD

Taesoo Song, Su Houng Lee

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The next to leading order quarkonium-hadron cross section is calculated in perturbative QCD. The corresponding leading order result was performed by Peskin more than 20 years ago using the operator product expansion. In this work, the calculation is performed using the Bethe-Salpeter amplitude and the factorization formula. The soft divergence appearing in the intermediate stages of the calculations are shown to vanish after adding all possible crossed terms, while the collinear divergences are eliminated by mass factorization. Applying the result to the Upsilon system, one finds that there are large higher order corrections near the threshold. The relevance of the present result to the charmonium case is also discussed.

Original languageEnglish
Article number034002
Pages (from-to)1-24
Number of pages24
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume72
Issue number3
DOIs
Publication statusPublished - 2005 Aug 1

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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