Leif Lönnblad
Professor
Evolution effects in Z0 fragmentation into charmonium
Author
Summary, in English
In Z0 decay into prompt charmonium, i.e. charmonium not originating from B-meson decays, the most important contribution is expected to come from colour-octet mechanisms. However, previous fixed-order calculations of the colour-octet contribution contain large logarithms which, in a more complete treatment, should be resummed to all orders. We study this resummation by using a Monte Carlo QCD cascade model and find that the fixed-order colouroctet result is diminished by 15%. We compare the Monte Carlo calculations with results obtained by using analytical evolution equations.
Publishing year
1997
Language
English
Pages
515-521
Publication/Series
Zeitschrift für Physik C Particles and Fields
Volume
76
Issue
3
Links
Document type
Journal article
Publisher
Springer
Topic
- Subatomic Physics
Status
Published
ISBN/ISSN/Other
- ISSN: 0170-9739