CERN Accelerating science

Article
Title Pseudorapidity distributions of charged particles in Pb-Pb collisions at super proton synchrotron energies from the NA50 experiment
Author(s)

Idzik, M ; Abreu, M C ; Alessandro, B ; Alexa, C ; Arnaldi, R ; Atayan, M ; Baglin, C ; Baldit, A ; Bedjidian, Marc ; Beolè, S ; Boldea, V ; Bordalo, P ; Borges, G ; Bussière, A ; Capelli, L ; Castanier, C ; Castor, J I ; Chaurand, B ; Chevrot, I ; Cheynis, B ; Chiavassa, E ; Cicalò, C ; Claudino, T ; Comets, M P ; Constans, N ; Constantinescu, S ; Cortese, P ; De Falco, A ; De Marco, N ; Dellacasa, G ; Devaux, A ; Dita, S ; Drapier, O ; Ducroux, L ; Espagnon, B ; Fargeix, J ; Force, P ; Gallio, M ; Gavrilov, Yu K ; Gerschel, C ; Giubellino, P ; Golubeva, M B ; Gonin, M ; Grigorian, A A ; Grigorian, S ; Grossiord, J Y ; Guber, F F ; Guichard, A ; Gulkanian, H R ; Hakobyan, R S ; Haroutunian, R ; Jouan, D ; Karavitcheva, T L ; Kluberg, L ; Kurepin, A B ; Le Bornec, Y ; Lourenço, C ; MacCormick, M ; Macciotta, P ; Marzari-Chiesa, A ; Masera, M ; Masoni, A ; Monteno, M ; Musso, A ; Petiau, P ; Piccotti, A ; Pizzi, J R ; Prado da Silva, W L ; Prino, F ; Puddu, G ; Quintans, C ; Ramello, L ; Ramos, S ; Rato-Mendes, P ; Riccati, L ; Romana, A ; Santos, H ; Saturnini, P ; Scalas, E ; Scomparin, E ; Serci, S ; Shahoyan, R ; Sigaudo, F ; Silva, S ; Sitta, M ; Sonderegger, P ; Tarrago, X ; Topilskaya, N S ; Usai, G L ; Vercellin, Ermanno ; Villatte, L ; Willis, N

Affiliation (Torino Univ, Italy) ; (Univ. Alessandria and INFN Torino, Italy) ; (LAPP, Annecy-le-Vieux, France) ; (LPC, Aubière, France) ; (IFA, Bucharest, Romania) ; (Univ. and INFN Calgari, Italy) ; (CERN) ; (LIP, Lisbon, Portugal) ; (INR, Moscow, Russia) ; (IPN, Orsay, France) ; (LPNHE, Palaiseau, France) ; (IRS, Strasbourg, France) ; (Univ. and INFN Torino, Italy) ; (IPN, Villeurbanne, France) ; (YerPhI, Yereva, Armenia) ; (FCT, Faro, Portugal) ; (IST, Lisbon, Portugal) ; (Univ. Mining and Metallurgy, Cracow, Poland)
Publication 2003
In: Pramana - J. Phys. 60 (2003) 1059-1065
In: 4th International Conference on Physics and Astrophysics of Quark-Gluon Plasma, Jaipur, India, 26 - 30 Nov 2001, pp.1059-1065
DOI 10.1007/BF02707031
Subject category Nuclear Physics
Accelerator/Facility, Experiment CERN SPS ; NA50
Abstract We present the measurements of charged particle pseudorapidity distributions $dN_{ch}/d \eta$ performed by the NA50 experiment in Pb-Pb collisions at the CERN SPS. Measurements were done at incident energies of 40 GeV ($\sqrt{s}$ = 8.77 GeV) and 158 GeV ($\sqrt{s}$ = 17.3 GeV) per nucleon over a broad impact parameter range. The multiplicity distributions are studied as a function of centrality using the number of participating nucleons ($N_{part}$), or the number of binary nucleon-nucleon collisions ($N_{coll}$). Their values at midrapidity exhibit a linear scaling with $N_{part}$ at both energies. Particle yield increases approximately by a factor of 2 between $\sqrt{s}$ = 8.77 GeV and $\sqrt{s}$ = 17.3 GeV. (5 refs).

Corresponding record in: Inspire
 Record created 2004-03-24, last modified 2018-09-24