|
|||||
|
|
Multiplicity difference between heavy- and light-quark jets revisited |
|
| Authors: | Yu L Dokshitzer F Fabbri V A Khoze W Ochs |
| Institution: | 1. LPTHE, University Paris-VI, 4 place Jussieu, 75252, Paris, France 2. PNPI, 188300, Gatchina, St. Petersburg, Russia 3. INFN e Dipartimento di Fisica dell'Università di Bologna, v.le Berti Pichat 6/2, 40127, Bologna, Italy 4. Department of Physics and Institute for Particle Physics Phenomenology, University of Durham, DH1 3LE, Durham, UK 5. Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), F?hringer Ring 6, 80805, München, Germany |
| Abstract: | The perturbative QCD approach to multiparticle production predicts a characteristic suppression of particle multiplicity in
a heavy-quark jet as compared to a light-quark jet. In the modified leading logarithmic approximation (MLLA) the multiplicity
difference
between heavy- and light-quark jets is derived in terms of a few other experimentally measured quantities. The earlier prediction
for b-quarks needs revision in the light of new experimental results and the improvement in the understanding of the experimental
data. We now find
. The updated MLLA results on
and
are compared with the present data from e + e- annihilation. Their expected energy independence is confirmed within the energy range between 29 and 200 GeV; the absolute
values are now in better agreement with experiment than in the previous analysis, and the remaining difference can be attributed
largely to next-to-MLLA contributions, an important subset of which are identified and evaluated.
Arrival of the final proofs: 22 November 2005 |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |