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Titolo:
Transverse energy from minijets in ultrarelativistic nuclear collisions: Anext-to-leading order analysis - art. no. 114006
Autore:
Eskola, KJ; Tuominen, K;
Indirizzi:
Univ Jyvaskyla, Dept Phys, FIN-40351 Jyvaskyla, Finland Univ Jyvaskyla Jyvaskyla Finland FIN-40351 FIN-40351 Jyvaskyla, Finland Univ Helsinki, Helsinki Inst Phys, FIN-00014 Helsinki, Finland Univ Helsinki Helsinki Finland FIN-00014 ys, FIN-00014 Helsinki, Finland
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 11, volume: 6311, anno: 2001,
pagine: 4006 -
SICI:
0556-2821(20010601)6311:11<4006:TEFMIU>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
INCLUSIVE CROSS-SECTION; HEAVY-ION COLLISIONS; PARTON DISTRIBUTIONS; HYDRODYNAMIC EVOLUTION; HADRON-COLLISIONS; PBARP COLLISIONS; GLUON PRODUCTION; JET PRODUCTION; FREEZE-OUT; QCD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Eskola, KJ Univ Jyvaskyla, Dept Phys, POB 35, FIN-40351 Jyvaskyla, FinlandUniv Jyvaskyla POB 35 Jyvaskyla Finland FIN-40351 yla, Finland
Citazione:
K.J. Eskola e K. Tuominen, "Transverse energy from minijets in ultrarelativistic nuclear collisions: Anext-to-leading order analysis - art. no. 114006", PHYS REV D, 6311(11), 2001, pp. 4006

Abstract

We compute in next-to-leading order (NLO) perturbative QCD the amount of transverse energy produced into a rapidity region DeltaY of a nuclear collision from partons created in the few-GeV subcollisions. The NLO formulation assumes collinear factorization and is based on the subtraction method. We first study the results as a function of the minimum transverse momentum scale and define and determine the associated K factors. The dependence of the NLO results on the scale choice and on the size of DeltaY is also studied. The calculations are performed for GRV94 and CTEQ5 sets of parton distributions. Also the effect of nuclear shadowing to the NLO results is investigated. The main results are that the NLO results are stable relative to the leading-order (LO) ones even in the few-GeV domain and that there exists a new kinematical region not present in the LO, which is responsible for the magnitude of the K factors. The dependence on the size of DeltaY is found to be practically linear within two central units of rapidity, and the scaledependence present at BNL RHIC energies is seen to vanish at the CERN LHC energies. Finally, the effect of NLO corrections to the determination of transverse energies and multiplicities in nuclear collisions is discussed within the framework of parton saturation.

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Documento generato il 04/04/20 alle ore 09:00:47