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Titolo:
CHARMONIUM PRODUCTION IN PB-PB INTERACTIONS AT 158 GEV C PER NUCLEON/
Autore:
RAMELLO L;
Indirizzi:
CNRS,IN2P3,LAPP ANNECY LE VIEUX FRANCE
Titolo Testata:
Nuclear physics. A
fascicolo: 1-2, volume: 638, anno: 1998,
pagine: 261 - 278
SICI:
0375-9474(1998)638:1-2<261:CPIPIA>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEAVY-ION COLLISIONS; J-PSI-SUPPRESSION; J/PSI SUPPRESSION; PARTON DISTRIBUTIONS; TRANSVERSE-MOMENTUM; CROSS-SECTIONS; DEPENDENCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
27
Recensione:
Indirizzi per estratti:
Citazione:
L. Ramello, "CHARMONIUM PRODUCTION IN PB-PB INTERACTIONS AT 158 GEV C PER NUCLEON/", Nuclear physics. A, 638(1-2), 1998, pp. 261-278

Abstract

The NA50 collaboration has measured J/psi, psi' and Drell-Yan pair production in Pb-Pb interactions at 158 GeV/c per nucleon at the CERN SPS. Final results from the 1995 run and preliminary ones from the higher statistics 1996 run are presented. An anomalous J/psi suppression (relative to the Drell-Yan process) has been observed with respect to the suppression pattern established in experiments NA38 and NA51 with proton, oxygen and sulfur beams. The 1996 data allow a detailed study ofthe suppression pattern in the Pb-Pb sample itself, showing a discontinuity around an E-T value (the neutral transverse electromagnetic energy) of 50 GeV. The psi' is also suppressed relative to Drell-Yan, with a pattern very similar to the one observed in S-U collisions. Finally, the pr distributions of dimuons are presented. The average p(T)(2) of the J/psi in Pb-Pb collisions does not increase any more with E-T above 100 GeV.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 17:07:28