Recent Results on Jet Fragmentation from Cdf

Details Recent Results on Jet Fragmentation from Cdf Recent Results on Jet Fragmentation from Cdf

Publishing date

Feb 2003

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003fuin.conf..330s&link_type=abstract

Journals

FUNDAMENTAL INTERACTIONS. Proceedings of the Seventeenth Lake Louise Winter Institute. Held 17-23 February 2002 in Lake Louise,

Science

Computer Science

Type

Scientific paper

Abstract

In this paper, the most recent results on jet fragmentation obtained at the Collider Detector at Fermilab Tevatron are presented. The multiplicity and momentum distribution of charged particles inside jets in dijet events are compared to the predictions of the Modified Leading Log Approximation complemented with the hypothesis of Local Parton-Hadron Duality. Values for the the two parameters of the model are extracted, the cut-off scale Qeff = 230 ± 40 MeV and the rate of parton-to-hadron conversions KLPHDcharged = 0.56 ± 0.10 . A fit of the data for the ratio of multiplicities in gluon and quark jets r, where r is treated as a free parameter, results in r = 1.9 ± 0.5. Also, we compare the charged particle multiplicities in dijet and γ-jet events. The comparison allows for an extraction of a model-independent ratio of multiplicities in gluon and quark jets. We report r = Ng/Nq = 1.61 ± 0.11(stat) ± 0.28(syst) for Ejet = 40 GeV.

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