Charged particle multiplicity in Pb-Pb collisions from the NA50 experiment

B. Alessandro; C. Alexa; R. Arnaldi; M. Atayan; C. Baglin; A. Baldit; M. Bedjidian; S. Beolè; V. Boldea; P. Bordalo; S. R Borenstein; G. Borges; A. Bussière; Laurent Capelli; C. Castanier; J. Castor; B. Chaurand; B. Cheynis; E. Chiavassa; C. Cicaló; T. Claudino; M. P Comets; S. Constantinescu; P. Cortese; J. Cruz; A. DeFalco; MarcoN. De; G. Dellacasa; A. Devaux; S. Dita; O. Drapier; B. Espagnon; J. Fargeix; P. Force; M. Gallio; Y. K Gavrilov; C. Gerschel; P. Giubellino; M. B Golubeva; M. Gonin; A. A Grigorian; S. Grigorian; J. Y Grossiord; F. F Guber; A. Guichard; H. Gulkanyan; R. Hokobyan; R. Haroutunian; M. Idzik; D. Jouan; T. L Karavitcheva; L. Kluberg; A. B Kurepin; Y. Le Bornec; C. Lourenço; P. Macciotta; M. Mac Cormick; A. Marzari-Chiesa; M. Masera; A. Masoni; M. Monteno; A. Musso; P. Petiau; A. Piccotti; J. R Pizzi; W. L Prado Da Silva; F. Prino; G. Puddu; C. Quintans; L. Ramello; S. Ramos; P. Rato Mendes; L. Riccati; A. Romana; H. Santos; P. Saturnini; E. Scalas; E. Scomparin; S. Serci; R. Shahoyan; F. Sigaudo; M. Sitta; P. Sonderegger; X. Tarrago; N. S Topilskaya; G. L Usai; E. Vercellin; L. Villatte; N. Willis; T. Wu

HAL : in2p3-00024210, version 1

DOI : 10.1088/1742-6596/5/1/008

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Focus On Multiplicity: International Workshop On Particle Multiplicity In Relativistic Heavy Ion Collisions, Bari : Italie

Charged particle multiplicity in Pb-Pb collisions from the NA50 experiment

B. Alessandro, C. Alexa, R. Arnaldi, M. Atayan, C. Baglin¹, A. Baldit², M. Bedjidian³, S. Beolè, V. Boldea, P. Bordalo, S. R Borenstein, G. Borges, A. Bussière¹, Laurent Capelli³, C. Castanier², J. Castor², B. Chaurand⁴, B. Cheynis³, E. Chiavassa, C. Cicaló, T. Claudino, M. P Comets⁵, S. Constantinescu, P. Cortese, J. Cruz, A. DeFalco, MarcoN. De, G. Dellacasa, A. Devaux², S. Dita, O. Drapier, B. Espagnon², J. Fargeix², P. Force², M. Gallio, Y. K Gavrilov, C. Gerschel⁵, P. Giubellino, M. B Golubeva, M. Gonin⁴, A. A Grigorian, S. Grigorian, J. Y Grossiord³, F. F Guber, A. Guichard³, H. Gulkanyan, R. Hokobyan, R. Haroutunian³, M. Idzik, D. Jouan⁵, T. L Karavitcheva, L. Kluberg⁴, A. B Kurepin, Y. Le Bornec⁵, C. Lourenço, P. Macciotta, M. Mac Cormick⁵, A. Marzari-Chiesa, M. Masera, A. Masoni, M. Monteno, A. Musso, P. Petiau⁴, A. Piccotti, J. R Pizzi³, W. L Prado Da Silva, F. Prino, G. Puddu, C. Quintans, L. Ramello, S. Ramos, P. Rato Mendes, L. Riccati, A. Romana⁴, H. Santos, P. Saturnini², E. Scalas, E. Scomparin, S. Serci, R. Shahoyan, F. Sigaudo, M. Sitta, P. Sonderegger, X. Tarrago⁵, N. S Topilskaya, G. L Usai, E. Vercellin, L. Villatte⁵, N. Willis⁵, T. Wu

NA50 Collaboration(s)

(2005)

Angular distributions of charged particles produced in Pb-Pb collisions at the CERN SPS have been measured by the NA50 experiment. Measurements have been performed with a silicon microstrip detector at two different beam energies (40 and 158 GeV/nucleon) and over a wide impact parameter (centrality) range. The centrality of the collision has been evaluated both by neutral transverse energy released in the interaction and by spectator nucleons energy (zero degree energy). The charged particle density at midrapidity shows a linear dependence on the number of participating nucleons at both beam energies. The particle density per participant pair and its $\sqrt{S}$ dependence are also studied.

1 :	LAPP - Laboratoire d'Annecy le Vieux de Physique des Particules

2 :	LPC-CLERMONT - Laboratoire de Physique Corpusculaire de Clermont-Ferrand

3 :	IPNL - Institut de Physique Nucléaire de Lyon

4 :	LLR - Laboratoire Leprince-Ringuet

5 :	IPNO - Institut de Physique Nucléaire d'Orsay

Thème(s)

Physique/Physique des Hautes Energies - Phénoménologie


in2p3-00024210, version 1
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Contributeur : Jeanine Pellet <>
Soumis le : Vendredi 3 Juin 2005, 16:10:34
Dernière modification le : Mercredi 24 Août 2005, 16:29:09