Factorization in exclusive quarkonium production

Geoffrey T. Bodwin, Xavier Garcia I Tormo, Jungil Lee

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

We present factorization theorems for two exclusive heavy-quarkonium production processes: production of two quarkonia in e+e- annihilation and production of a quarkonium and a light meson in B-meson decays. We describe the general proofs of factorization and supplement them with explicit one-loop analyses, which illustrate some of the features of the soft-gluon cancellations. We find that violations of factorization are generally suppressed relative to the factorized contributions by a factor v2mc/Q for each S-wave charmonium and a factor mc/Q for each L-wave charmonium with L>0. Here, v is the velocity of the heavy quark or antiquark in the quarkonium rest frame, Q=√s for e+e- annihilation, Q=mB for B-meson decays, √s is the e+e- center-of-momentum energy, mc is the charm-quark mass, and mB is the B-meson mass. There are modifications to the suppression factors if quantum-number restrictions apply for the specific process.

Original languageEnglish
Article number114014
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume81
Issue number11
DOIs
Publication statusPublished - 2010 Jun 8

ASJC Scopus subject areas

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

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