Coherent Description of D^{*+-} Production in e^+e^- and Low-Q^2 ep Collisions

Details Coherent Description of D^{*+-} Production in e^+e^- and Low-Q^2 ep Collisions Coherent Description of D^{*+-} Production in e^+e^- and Low-Q^2 ep Collisions

1997-02-24

arxiv.org/abs/hep-ph/9702408v2

Z.Phys. C76 (1997) 677-688

Physics

High Energy Physics

High Energy Physics - Phenomenology

31 pages (Latex), 11 figures (Postscript). This version of the manuscript is identical with the journal publication

Scientific paper

We present new sets of fragmentation functions for D^{*+-} mesons, both at leading and next-to-leading order. They are determined by fitting LEP1 data on inclusive D^{*+-} production in e^+e^- annihilation. In one of the sets, we take the charm-quark fragmentation function to be of the form proposed by Peterson et al. and thus obtain updated values of the epsilon_c parameter and the c -> D^{*+} branching ratio. The new fragmentation functions lead to an excellent description of other e^+e^- data with centre-of-mass energies between 10 and 35 GeV. They also nicely agree with recent HERA data on inclusive D^{*+-} photoproduction in ep collisions, which may be considered as a test of the universality of the fragmentation into D^{*+-} mesons.

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