Multiplicity Difference between Heavy and Light Quark Jets Revisited

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dc.creatorDokshitzer, Yuri L.
dc.creatorFabbri, Fabrizio
dc.creatorKhoze, Valery A.
dc.creatorOchs, Wolfgang
dc.date2005-08-05
dc.date2005-10-10
dc.date.accessioned2026-07-07T12:25:12Z
dc.date.available2026-07-07T12:25:12Z
dc.descriptionThe 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 δ_{Q\ell} 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 δ_{b\ell}=4.4\pm0.4. The updated MLLA results on δ_{b\ell} and δ_{c\ell} 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.
dc.description33 pages, 2 figures, version to appear in Eur.Phys.J.C
dc.identifierhttps://arxiv.org/abs/hep-ph/0508074
dc.identifierhttp://arxiv.org/abs/hep-ph/0508074
dc.identifierEur.Phys.J.C45:387-400,2006
dc.identifierdoi:10.1140/epjc/s2005-02424-5
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/214547
dc.subjectHigh Energy Physics - Phenomenology
dc.titleMultiplicity Difference between Heavy and Light Quark Jets Revisited
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