1997/02/21 by Matteo Cacciari, M. Greco, Mario Greco · 54 citations
Physics and Astronomy · #DESY #Fragmentation function #HERA #High-Energy Particle Collisions Research #Meson #Nuclear physics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Parton #Perturbative QCD #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #hep-ph
paper · pdf · doi:10.1103/physrevd.55.7134
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 55(11), 7134-7143 (American Physical Society) · 20 pages, LaTeX2e, 8 Postscript figures
arxiv created 1997/02/21 · openalex publication_date 1997/06/01 · arxiv updated 2014/11/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Fragmentation functions for D mesons, based on the convolution of a perturbative part, related to the heavy quark perturbative showering, and a nonperturbative model for its hadronization into the meson, are used to describe D* production in e+e^\ensuremath- and ep collisions. The nonperturbative part is determined by fitting the e+e^\ensuremath- data taken by ARGUS and OPAL at 10.6 and 91.2 GeV, respectively. When fitting with a nonperturbative Peterson fragmentation function and using next-to-leading evolution for the perturbative part, we find an \ensuremathε parameter significantly different from the one commonly used, which is instead found with a leading order fit. The use of this new value is shown to increase considerably the cross section for D* production at DESY HERA, suggesting a possible reconciliation between the next-to-leading order theoretical predictions and the experimental data.