Measurement of the charm fragmentation function in D* photoproduction at HERA

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dc.creatorZEUS Collaboration
dc.creatorChekanov, S.
dc.date2009-01-09
dc.date2009-04-17
dc.date.accessioned2026-07-07T13:07:43Z
dc.date.available2026-07-07T13:07:43Z
dc.descriptionThe charm fragmentation function has been measured in D* photoproduction with the ZEUS detector at HERA using an integrated luminosity of 120 pb-1. The fragmentation function is measured versus z = (E+p_parallel){D*}/2E{jet}, where E is the energy of the D* meson and p_parallel is the longitudinal momentum of the D* meson relative to the axis of the associated jet of energy E{jet}. Jets were reconstructed using the kT clustering algorithm and required to have transverse energy larger than 9 GeV. The D* meson associated with the jet was required to have a transverse momentum larger than 2 GeV. The measured function is compared to different fragmentation models incorporated in leading-logarithm Monte Carlo simulations and in a next-to-leading-order QCD calculation. The free parameters in each fragmentation model are fitted to the data. The extracted parameters and the function itself are compared to measurements from e+e- experiments.
dc.description19 pages, 5 figures, 3 tables, accepted by JHEP. New version including small textual clarifications in response to journal referee
dc.identifierhttps://arxiv.org/abs/0901.1210
dc.identifierhttp://arxiv.org/abs/0901.1210
dc.identifierJHEP 0904:082,2009
dc.identifierdoi:10.1088/1126-6708/2009/04/082
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/228184
dc.subjectHigh Energy Physics - Experiment
dc.titleMeasurement of the charm fragmentation function in D* photoproduction at HERA
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