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Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
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 two parameters of the model are extracted, the cut-off scale Q[sub eff]= 230[+-] 40 MeV and the rate of parton-to-hadron conversions K[sub LPHD][sup charged]= 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[gamma]-jet events. The comparison allows for an extraction of a model-independent ratio of multiplicities in gluon and quark jets. We report r= N[sub g]/N[sub q]= 1.61[+-] 0.11(stat)[+-] 0.28(syst) for E[sub jet]= 40 GeV.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
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 two parameters of the model are extracted, the cut-off scale Q[sub eff]= 230[+-] 40 MeV and the rate of parton-to-hadron conversions K[sub LPHD][sup charged]= 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[gamma]-jet events. The comparison allows for an extraction of a model-independent ratio of multiplicities in gluon and quark jets. We report r= N[sub g]/N[sub q]= 1.61[+-] 0.11(stat)[+-] 0.28(syst) for E[sub jet]= 40 GeV.
Author: Sergo Jindariani Publisher: ISBN: Category : Languages : en Pages : 3
Book Description
Presented are the latest results of jet fragmentation studies at the Tevatron using the CDF Run II detector. Studies include the distribution of transverse momenta (Kt) of particles jets, two-particle momentum correlations, and indirectly global event shapes in p{bar p} collisions. Results are discussed within the context of recent Next-to-Leading Log calculations as well as earlier experimental results from the Tevatron and e{sup +}e{sup -} colliders.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
We present recent results on jet fragmentation, jet evolution in jet and minimum bias events, and underlying event studies. The results presented in this talk address significant questions relevant to QCD and, in particular, to jet studies. One topic discussed is jet fragmentation and the possibility of describing it down to very small momentum scales in terms of pQCD. Another topic is the studies of underlying event energy originating from fragmentation of partons not associated with the hard scattering.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
Presented are the most recent jet fragmentation results from CDF: inclusive distributions of charged particle momenta and their k{sub T} in jets; average track multiplicities, as well as angular distributions of multiplicity flow, for a wide range of jet energies with E{sub T} from 40 to 300 GeV. The results are compared with Monte-Carlo and, when possible, analytical calculations performed in resumed perturbative QCD approximations (MLLA).
Author: A. Safonov Publisher: ISBN: Category : Languages : en Pages : 4
Book Description
The latest results on jet physics at CDF are presented and discussed. Particular attention is paid to studies of the inclusive jet cross section using 177 pb{sup -1} of Run II data. Also discussed is a study of gluon and quark jet fragmentation.
Author: A. Astbury Publisher: World Scientific ISBN: 9812705139 Category : Science Languages : en Pages : 423
Book Description
The Lake Louise Winter Institute is held annually to explore recent trends in high energy physics in an informal setting. Pedagogical and review lectures are presented by invited experts. A topical workshop is held in conjunction with the Institute, with presentations by participants.
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Author: Sergo Jindariani
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Author: A. Safonov
Author: J. Thanh Van Tran
Author: A. Astbury
Author: J. Thanh Van Tran
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Author: M. Greco