Pseudorapidity distributions of charged particles in Pb–Pb collisions at super proton synchrotron energies from the NA50 experiment

Pramana

F Prino^1,11  M Masera1 1^1,11  J Y Grossiord¹²  R Haroutunian¹²  M Bedjidian¹²  F F Guber1^1,15  L Kluberg1³  R Hakobyan^1,14  Y K Gavrilov1^1,15  P Giubellino1 1^1,11  R Shahoyan^1,14  F Sigaudo^1,11  T Claudino^1,9  R Arnaldi^1,11  M Atayan^1,14  S Serci1^1,5  M B Golubeva1^1,15  N S Topilskaya1^1,15  S Beolè^1,11  A Guichard¹²  M Monteno^1,11  B Espagnon¹³  L Villatte1¹  P Sonderegger10 1⁸  Y Le Bornee1¹⁰  G Puddu1^1,5  G Borges^1,9  B Alessandro^1,11  B Chaurand1³  S Grigorian^1,14  C Gerschel1¹⁰  W L Prado da Silva1 1^1,11  A Musso^1,11  J R Pizzi¹²  A Devaux¹³  S Constantinescu^1,6  A A Grigorian^1,14  A Masoni1^1,5  C Quintans^1,9  H Santos^1,9  M Sitta1¹⁶  C Castanier¹³  M Gonin1³  P Macciotta1^1,5  A Piccotti^1,11  O Drapier1³  T L Karavitcheva1^1,15  E Chiavassa^1,11  P Petiau1³  C Lourenço1⁴  M Idzik1^1,11  M P Comets1¹⁰  V Boldea^1,6  P Saturnini¹³  A Bussière²  L Capelli¹²  P Bordalo10⁸  M Mac Cormick1¹⁰  S Silva^1,9  J Castor¹³  A Baldit¹³  E Scalas1¹⁶  N Constans1³  D Jouan1¹⁰  M Gallio^1,11  M C Abreu3^1,9  I Chevrot¹³  N De Marco^1,11  C Alexa^1,6  P Cortese1¹⁶  E Scomparin1^1,7  L Ramello1¹⁶  P Force¹³  L Riccati^1,11  C Cicalò1^1,5  B Cheynis¹²  P Rato Mendes^1,9  G L Usai12 1^1,5  J Fargeix¹³  E Vercellin^1,11  A Romana1³  H Gulkanyan^1,14  A De Falco1^1,5  L Ducroux¹²  A Marzari-Chiesa^1,11  X Tarrago1¹⁰  Marek Idzik1^1,11  S Dita^1,6  S Ramos10⁸  C Baglin²  A B Kurepin1^1,15  G Dellacasa1¹⁶ 

[1] LAPP, CNRS-IN2P3, Annecy-le-Vieux, France$$;LPNHE, Ecole Polytechnique and CNRS-IN2P3, Palaiseau, France$$;CERN, Geneva, Switzerland$$;Università di Cagliari/INFN, Cagliari, Italy$$;IFA, Bucharest, Romania$$;IRS, Univ. Louis Pasteur and CNRS-IN2P3, Strasbourg, France$$;IST, Universidade Técnica de Lisboa, Lisbon, Portugal$$;LIP, Lisbon, Portugal$$;IPN, Univ. de Paris-Sud and CNRS-IN2P3, Orsay, France$$;Università di Torino/INFN, Torino, Italy$$;IPN, Univ. Claude Bernard and CNRS-IN2P3, Villeurbanne, France$$;LPC, Univ. Blaise Pascal and CNRS-IN2P3, Aubière, France$$;YerPhI, Yerevan, Armenia$$;INR, Moscow, Russia$$;Università del Piemonte Orientale, Alessandria and INFN-Torino, Italy$$

关键词: Relativistic heavy-ion collisions;    pseudorapidity distributions;    multiparticle production;    silicon multiplicity detectors.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

We present the measurements of charged particle pseudorapidity distributions d𝑁ch/d𝜂 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 (𝑁part), or the number of binary nucleon–nucleon collisions (𝑁coll). Their values at midrapidity exhibit a linear scaling with 𝑁part at both energies. Particle yield increases approximately by a factor of 2 between $sqrt{s}=8.77$ GeV and $sqrt{s}=17.3$ GeV.

【 授权许可】

Unknown