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Titolo:
Dimuon and charm production in nucleus-nucleus collisions at the CERN-SPS
Autore:
Abreu, MC; Alessandro, B; Alexa, C; Arnaldi, R; Astruc, J; Atayan, M; Baglin, C; Baldit, A; Bedjidian, M; Bellaiche, F; Beole, S; Boldea, V; Bordalo, P; Borhani, A; Bussiere, A; Capelli, L; Capony, V; Casagrande, L; Castor, J; Chambon, T; Chaurand, B; Chevrot, I; Cheynis, B; Chiavassa, E; Cicalo, C; Claudino, T; Comets, MP; Constans, N; Constantinescu, S; Cruz, J; De Falco, A; De Marco, N; Dellacasa, G; Devaux, A; Dita, S; Drapier, O; Ducroux, L; Espagnon, B; Fargeix, J; Fleuret, F; Force, P; Gallio, M; Gavrilov, YK; Gerschel, C; Giubellino, P; Golubeva, MB; Gonin, M; Grigorian, AA; Grossiord, JY; Guber, FF; Guichard, A; Gulkanyan, H; Hakobyan, R; Haroutunian, R; Idzik, M; Jouan, D; Karavitcheva, TL; Kluberg, L; Kurepin, AB; Le Bornec, Y; Lourenco, C; Macciotta, P; Mac Cormick, M; Marzari-Chiesa, A; Masera, M; Masoni, A; Mehrabyan, S; Monteno, M; Mourgues, S; Musso, A; Ohlsson-Malek, F; Petiau, P; Piccotti, A; Pizzi, JR; Puddu, G; Quintans, C; Racca, C; Ramello, L; Ramos, S; Rato-Mendes, P; Riccati, L; Romana, A; Ropotar, I; Saturnini, P; Scomparin, E; Serci, S; Shahoyan, R; Silva, S; Sitta, M; Soave, C; Sonderegger, P; Tarrago, X; Topilskaya, NS; Usai, GL; Vercellin, E; Villatte, L; Willis, N;
Indirizzi:
Univ Turin, Ist Nazl Fis Nucl, Turin, Italy Univ Turin Turin ItalyUniv Turin, Ist Nazl Fis Nucl, Turin, Italy Univ Piemonte Orientale, Alessandria, Italy Univ Piemonte Orientale Alessandria Italy Orientale, Alessandria, Italy Ist Nazl Fis Nucl, I-10125 Turin, Italy Ist Nazl Fis Nucl Turin Italy I-10125 azl Fis Nucl, I-10125 Turin, Italy IN2P3, CNRS, LAPP, Annecy Le Vieux, France IN2P3 Annecy Le Vieux FranceIN2P3, CNRS, LAPP, Annecy Le Vieux, France Univ Blaise Pascal, LPC, Aubiere, France Univ Blaise Pascal Aubiere France v Blaise Pascal, LPC, Aubiere, France IN2P3, CNRS, Aubiere, France IN2P3 Aubiere FranceIN2P3, CNRS, Aubiere, France IFA, Bucharest, Romania IFA Bucharest RomaniaIFA, Bucharest, Romania Univ Cagliari, Ist Nazl Fis Nucl, Cagliari, Italy Univ Cagliari CagliariItaly gliari, Ist Nazl Fis Nucl, Cagliari, Italy CERN, Geneva, Switzerland CERN Geneva SwitzerlandCERN, Geneva, Switzerland INR, Moscow, Russia INR Moscow RussiaINR, Moscow, Russia Univ Paris 11, IPN, Orsay, France Univ Paris 11 Orsay FranceUniv Paris 11, IPN, Orsay, France IN2P3, CNRS, Orsay, France IN2P3 Orsay FranceIN2P3, CNRS, Orsay, France Ecole Polytech, LPNHE, Palaiseau, France Ecole Polytech Palaiseau France cole Polytech, LPNHE, Palaiseau, France IN2P3, CNRS, Palaiseau, France IN2P3 Palaiseau FranceIN2P3, CNRS, Palaiseau, France Univ Strasbourg 1, IRS, Strasbourg, France Univ Strasbourg 1 Strasbourg France rasbourg 1, IRS, Strasbourg, France IN2P3, CNRS, Strasbourg, France IN2P3 Strasbourg FranceIN2P3, CNRS, Strasbourg, France Univ Lyon 1, IPN, F-69622 Villeurbanne, France Univ Lyon 1 Villeurbanne France F-69622 PN, F-69622 Villeurbanne, France IN2P3, CNRS, Villeurbanne, France IN2P3 Villeurbanne FranceIN2P3, CNRS, Villeurbanne, France YerPhI, Yerevan, Armenia YerPhI Yerevan ArmeniaYerPhI, Yerevan, Armenia Univ Algarve, Unidad Ciencias Exactas & Humanas, P-8000 Faro, Portugal Univ Algarve Faro Portugal P-8000 actas & Humanas, P-8000 Faro, Portugal Univ Tecn Lisbon, Inst Super Tecn, P-1096 Lisbon, Portugal Univ Tecn Lisbon Lisbon Portugal P-1096 er Tecn, P-1096 Lisbon, Portugal LIP, P-1000 Lisbon, Portugal LIP Lisbon Portugal P-1000LIP, P-1000 Lisbon, Portugal
Titolo Testata:
EUROPEAN PHYSICAL JOURNAL C
fascicolo: 3, volume: 14, anno: 2000,
pagine: 443 - 455
SICI:
1434-6044(200006)14:3<443:DACPIN>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANOMALOUS J/PSI SUPPRESSION; PB-PB INTERACTIONS; 158 GEV/C; ENERGIES; DEPENDENCE; SPECTRA; PHYSICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Scomparin, E Univ Turin, Ist Nazl Fis Nucl, Turin, Italy Univ Turin Turin Italy in, Ist Nazl Fis Nucl, Turin, Italy
Citazione:
M.C. Abreu et al., "Dimuon and charm production in nucleus-nucleus collisions at the CERN-SPS", EUR PHY J C, 14(3), 2000, pp. 443-455

Abstract

Muon pair production in p-A, S-U and Pb-Pb collisions has been studied by the NA38 and NA50 collaborations at the CERN SPS. In this paper we present an analysis of the dimuon invariant mass region between the phi and the J/psi. In p-A collisions we find that, after the subtraction of the combinatorial background due to pi and K decays, the superposition of dimuons from semi-leptonic decays of D mesons and from the Drell-Yan process reproduces well the measured mass and transverse momentum spectra. The yield of open charm dimuons required to fit our data leads to a charm production cross section in good agreement with previous measurements. A linear extrapolation of the p-A sources with the product of the mass numbers of the projectile and target nuclei, A x B, underestimates the dimuon yield measured in S-U and Pb-Pb collisions. The excess increases with the number of participant nucleons, and the ratio between the observed dimuon yield and the expected sources reaches a factor 2 for central Pb-Pb interactions. The kinematical distributions of the measured dimuon excess are compatible with those expected from the open charm contribution.

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Documento generato il 05/12/20 alle ore 22:44:47