Perturbative QCD fragmentation functions as a model for heavy-quark fragmentation

Eric Braaten, Kingman Cheung, Sean P Fleming, Chiang Yuan Tzu Chiang Yuan

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Abstract

The perturbative QCD fragmentation functions for a heavy quark to fragment into heavy-light mesons are studied in the heavy-quark limit. The fragmentation functions for S-wave pseudoscalar and vector mesons are calculated to next-to-leading order in the heavy-quark mass expansion using the methods of heavy-quark effective theory. The results agree with the mb→ limit of the perturbative QCD fragmentation functions for b̄ into Bc and Bc*. We discuss the application of the perturbative QCD fragmentation functions as a model for the fragmentation of heavy quarks into heavy-light mesons. Using this model we predict the fraction PV of heavy-light mesons that are produced in the vector meson state as functions of the longitudinal momentum fraction z and the transverse momentum relative to the jet axis. The fraction PV is predicted to vary from about 1/2 at small z to almost 3/4 near z=1.

Original languageEnglish (US)
Pages (from-to)4819-4829
Number of pages11
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume51
Issue number9
DOIs
Publication statusPublished - 1995
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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