Bottom-quark fragmentation: comparing results from tuned event generators and resummed calculations
Abstract
We study bottom-quark fragmentation in e+e- annihilation, top and Higgs decay H -> b bbar, using Monte Carlo event generators, as well as calculations, based on the formalism of perturbative fragmentation functions, which resum soft- and collinear-radiation effects in the next-to-leading logarithmic approximation. We consider the PYTHIA and HERWIG generators, and implement matrix-element corrections to the parton shower simulation of the H -> b bbar process in HERWIG. We tune the Kartvelishvili, string and cluster models to B-hadron data from LEP and SLD, and present results in both x_B and moment spaces. The B-hadron spectra yielded by HERWIG, PYTHIA and resummed calculations show small discrepancies, which are due to the different approaches and models employed and to the quality of the fits to the e+e- data.
Keywords
Cite
@article{arxiv.hep-ph/0508013,
title = {Bottom-quark fragmentation: comparing results from tuned event generators and resummed calculations},
author = {Gennaro Corcella and Volker Drollinger},
journal= {arXiv preprint arXiv:hep-ph/0508013},
year = {2008}
}
Comments
22 pages, 11 colour figures. Minor changes in the text, published version