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Multiplicity distribution and spectra of negatively charged hadrons in Au+Au collisions at square root of (sNN) = 130 GeV |
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| Authors: | Adler C Ahammed Z Allgower C Amonett J Anderson B D Anderson M Averichev G S Balewski J Barannikova O Barnby L S Baudot J Bekele S Belaga V V Bellwied R Berger J Bichsel H Bland L C Blyth C O Bonner B E Bossingham R Boucham A Brandin A Caines H Calderón De La Barca Sánchez M Cardenas A Carroll J Castillo J Castro M Cebra D Chattopadhyay S Chen M L Chen Y Chernenko S P Cherney M Chikanian A Choi B Christie W Coffin J P Conin L Cormier T M Cramer J G Crawford H J DeMello M Deng W S Derevschikov A A Didenko L Draper J E Dunin V B Dunlop J C Eckardt V Efimov L G Emelianov V Engelage J Eppley G |
| Institution: | University of Frankfurt, Frankfurt, Germany. |
| Abstract: | The minimum-bias multiplicity distribution and the transverse momentum and pseudorapidity distributions for central collisions have been measured for negative hadrons ( h(-)) in Au+Au interactions at square root of (s(NN)]) = 130 GeV. The multiplicity density at midrapidity for the 5% most central interactions is dN(h(-))/d(eta)/(eta = 0) = 280+/-1(stat)+/-20(syst), an increase per participant of 38% relative to pp collisions at the same energy. The mean transverse momentum is 0.508+/-0.012 GeV/c and is larger than in central Pb+Pb collisions at lower energies. The scaling of the h(-) yield per participant is a strong function of p( perpendicular). The pseudorapidity distribution is almost constant within /eta/<1. |
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