Recent developments in heavy quark and quarkonium production

Published

Journal Article

Recent measurements of J/ψ production in e+e- colliders pose a challenge to the NRQCD factorization theorem for quarkonium production. Discrepancies between leading order calculations of color-octet contributions and the momentum distribution of J/ψ observed by Belle and BaBar are resolved by resumming large perturbative and nonperturbative corrections that are enhanced near the kinematic endpoint. The large cross sections for J/ψcc̄ and double quarkonium production remain poorly understood. Nonperturbative effects in fixed-target hadroproduction of open charm are also discussed. Large asymmetries in the production of charm mesons and baryons probe nonperturbative corrections to the QCD factorization theorem. A power correction called heavy-quark recombination can economically explain these asymmetries with a few universal parameters.

Duke Authors

Cited Authors

  • Mehen, T

Published Date

  • January 1, 2004

Published In

Volume / Issue

  • 35 / 1

Start / End Page

  • 121 - 129

International Standard Serial Number (ISSN)

  • 0587-4254

Citation Source

  • Scopus