Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-07-03
ECONFC0601121:E005,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
Latex, 9 pages, talk given by M. Cacciari at FRIF workshop on first principles non-perturbative QCD of hadron jets, LPTHE, Par
Scientific paper
This talk summarizes the results of a phenomenological analysis of heavy quark fragmentation data published by the CLEO and BELLE collaborations at \sqrt{s} = 10.6 GeV and by the LEP collaborations at \sqrt{s} = 91.2 GeV. Several theoretical ingredients are employed: next-to-leading order initial conditions, evolution and coefficient functions; soft-gluon resummation to next-to-leading-log accuracy; a next-to-leading order matching condition for the crossing of the bottom threshold in the evolution. Important initial-state electromagnetic radiation effects in the CLEO and BELLE data are also accounted for. We find that with reasonably simple choices of a non-perturbative correction to the fixed-order initial condition for the evolution, the data from CLEO and BELLE can be fitted with remarkable accuracy. The fitted fragmentation function, when evolved to LEP energies, does not however represent fairly the D* fragmentation spectrum measured by ALEPH. Large non-perturbative corrections to the coefficient functions of the meson spectrum are needed in order to reconcile CLEO/BELLE and ALEPH results.
Cacciari Matteo
Nason Paolo
Oleari Carlo
No associations
LandOfFree
Power-suppressed effects in heavy quark fragmentation functions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Power-suppressed effects in heavy quark fragmentation functions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power-suppressed effects in heavy quark fragmentation functions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-415707