Evolution Effects in Z^0 Fragmentation into Charmonium

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dc.creatorErnstrom, P.
dc.creatorLonnblad, L.
dc.creatorVanttinen, M.
dc.date1996-12-19
dc.date.accessioned2026-07-07T04:01:01Z
dc.date.available2026-07-07T04:01:01Z
dc.descriptionIn Z^0 decay into prompt charmonium, ie. 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 colour-octet result is diminished by 15%. We compare the Monte Carlo calculations with results obtained by using analytical evolution equations.
dc.identifierhttps://arxiv.org/abs/hep-ph/9612408
dc.identifierhttp://arxiv.org/abs/hep-ph/9612408
dc.identifierZ.Phys. C76 (1997) 515-521
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/46753
dc.subjectHigh Energy Physics - Phenomenology
dc.titleEvolution Effects in Z^0 Fragmentation into Charmonium
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