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Back BB, Baker MD, Barton DS, Basilev S, Bates BD, Baum R, Betts RR, Białas A, Bindel R, Bogucki W, Budzanowski A, Busza W, Carroll A, Ceglia M, Chang YH, Chen AE, Coghen T, Conner C, Czyz W, Dabrowski B, Decowski MP, Despet M, Fita P, Fitch J, Friedl M, Gałuszka K, Ganz R, Garcia E, George N, Godlewski J, Gomes C, Griesmayer E, Gulbrandsen K, Gushue S, Halik J, Halliwell C, Haridas P, Hayes A, Heintzelman GA, Henderson C, Hollis R, Hołyński R, Holzman B, Johnson E, Kane J, Katzy J, Kita W, Kotuła J, Kraner H, Kucewicz W, Kulinich P, LawV C, Lemler M, Ligocki J, Lin WT, Manly S, McLeod D, Michałowski J, Mignerey A, Mülmenstädt J, Neal M, Nouicer R, Olszewski A, Pak R, Park IC, Patel M, Pernegger H, Plesko M, Reed C, Remsberg LP, Reuter M, Roland C, Roland G, Ross D, Rosenberg L, Ryan J, Sanzgiri A, Sarin P, Sawicki P, Scaduto J, Shea J, Sinacore J, Skulski W, Steadman SG, Stephans GS, Steinberg P, Straczek A, Stodulski M, Strek M, Stopa Z, Sukhanov A, Surowiecka K, Tang JL, Teng R, Trzupek A, Vale C, van Nieuwenhuizen GJ, Verdier R, Wadsworth B, Wolfs FL, Wosiek B, Woźniak K, Wuosmaa AH, Wysłouch B, Zalewski K, Zychowski P. Charged-particle multiplicity near midrapidity in central Au+Au collisions at sqrt[SNN]=56 and 130 GeV. Phys Rev Lett 2000; 85:3100-3104. [PMID: 11019276 DOI: 10.1103/physrevlett.85.3100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2000] [Indexed: 05/23/2023]
Abstract
We present the first measurement of pseudorapidity densities of primary charged particles near midrapidity in Au+Au collisions at sqrt[s(NN)] = 56 and 130 GeV. For the most central collisions, we find the charged-particle pseudorapidity density to be dN/deta|(|eta|<1) = 408+/-12(stat)+/-30(syst) at 56 GeV and 555+/-12(stat)+/-35(syst) at 130 GeV, values that are higher than any previously observed in nuclear collisions. Compared to proton-antiproton collisions, our data show an increase in the pseudorapidity density per participant by more than 40% at the higher energy.
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Affiliation(s)
- B B Back
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843, USA
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