Results on psi-prime production in nucleus-nucleus collisions at CERN-SPS

Sitta, M.; Alessandro, B.; Alexa, C.; Arnaldi, R.; Atayan, M.; Beole, S.; Boldea, V.; Bordalo, P.; Borges, G.; Castanier, C.; Castor, J.; Chaurand, B.; Cheynis, B.; Chiavassa, E.; Cicalo, C.; Comets, M. P.; Constantinescu, S.; Cortese, P.; DE FALCO, Alessandro; DE MARCO, N.; Dellacasa, G.; Devaux, A.; Dita, S.; Fargeix, J.; Force, P.; Gallio, M.; Gerschel, C.; Giubellino, P.; Golubeva, M. B.; Grigorian, A. A.; Grigoryan, S.; Guber, F. F.; Guichard, A.; Gulkanyan, H.; Idzik, M.; Jouan, D.; Karavitcheva, T. L.; Kluberg, L.; Kurepin, A. B.; LE BORNEC, Y.; Lourenco, C.; MAC CORMICK, M.; MARZARI CHIESA, A.; Masera, M.; Masoni, A.; Monteno, M.; Musso, A.; Petiau, P.; Piccotti, A.; Pizzi, J. R.; Prino, F.; Puddu, Giovanna; Quintans, C.; Ramello, L.; Ramos, S.; Riccati, L.; Santos, H.; Saturnini, P.; Scomparin, E.; Serci, S.; Shahoyan, R.; Sigaudo, F.; Sonderegger, P.; Tarrago, X.; Topilskaya, N. S.; Usai, G. L.; Vercellin, E.; Villatte, L.; Willis, N.; Wu, T.

Abstract We report results on ψ' production in Pb–Pb interactions at 158 GeV/c per nucleon incident momentum, from data collected by the NA50 experiment at CERN SPS. A comparison of proton- and sulfur-induced collisions shows a similar ψ' production rate per nucleon–nucleon collision for S–U and Pb–Pb reactions, decreasing with increasing centrality and significantly lower than the rate measured from proton-induced reactions. This feature contrasts with J/ψ production which exhibits a similar behaviour for reactions induced by protons and by sulfur nuclei and a significantly suppressed rate for Pb–Pb interactions.

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Titolo:	Results on psi-prime production in nucleus-nucleus collisions at CERN-SPS
Autori:	M. SITTA B. ALESSANDRO C. ALEXA R. ARNALDI M. ATAYAN S. BEOLE V. BOLDEA P. BORDALO G. BORGES C. CASTANIER J. CASTOR B. CHAURAND B. CHEYNIS E. CHIAVASSA C. CICALO M. P. COMETS S. CONSTANTINESCU P. CORTESE DE FALCO, ALESSANDRO N. DE MARCO G. DELLACASA A. DEVAUX S. DITA J. FARGEIX P. FORCE M. GALLIO C. GERSCHEL P. GIUBELLINO M. B. GOLUBEVA A. A. GRIGORIAN S. GRIGORYAN F. F. GUBER A. GUICHARD H. GULKANYAN M. IDZIK D. JOUAN T. L. KARAVITCHEVA L. KLUBERG A. B. KUREPIN Y. LE BORNEC C. LOURENCO M. MAC CORMICK A. MARZARI CHIESA M. MASERA A. MASONI M. MONTENO A. MUSSO P. PETIAU A. PICCOTTI J. R. PIZZI F. PRINO PUDDU, GIOVANNA C. QUINTANS L. RAMELLO S. RAMOS L. RICCATI H. SANTOS P. SATURNINI E. SCOMPARIN S. SERCI R. SHAHOYAN F. SIGAUDO P. SONDEREGGER X. TARRAGO N. S. TOPILSKAYA USAI, GIANLUCA E. VERCELLIN L. VILLATTE N. WILLIS T. WU mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2004
Abstract:	Abstract We report results on ψ' production in Pb–Pb interactions at 158 GeV/c per nucleon incident momentum, from data collected by the NA50 experiment at CERN SPS. A comparison of proton- and sulfur-induced collisions shows a similar ψ' production rate per nucleon–nucleon collision for S–U and Pb–Pb reactions, decreasing with increasing centrality and significantly lower than the rate measured from proton-induced reactions. This feature contrasts with J/ψ production which exhibits a similar behaviour for reactions induced by protons and by sulfur nuclei and a significantly suppressed rate for Pb–Pb interactions.
Handle:	http://hdl.handle.net/11584/18114
ISBN:	0954-3899
Tipologia:	4.1 Contributo in Atti di convegno

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