Charged-particle multiplicity near midrapidity in central Au+Au collisions at sqrt[SNN]=56 and 130 GeV

B B Back; M D Baker; D S Barton; S Basilev; B D Bates; R Baum; R R Betts; A Białas; R Bindel; W Bogucki; A Budzanowski; W Busza; A Carroll; M Ceglia; Y H Chang; A E Chen; T Coghen; C Conner; W Czyz; B Dabrowski; M P Decowski; M Despet; P Fita; J Fitch; M Friedl; K Gałuszka; R Ganz; E Garcia; N George; J Godlewski; C Gomes; E Griesmayer; K Gulbrandsen; S Gushue; J Halik; C Halliwell; P Haridas; A Hayes; G A Heintzelman; C Henderson; R Hollis; R Hołyński; B Holzman; E Johnson; J Kane; J Katzy; W Kita; J Kotuła; H Kraner; W Kucewicz; P Kulinich; C LawV; M Lemler; J Ligocki; W T Lin; S Manly; D McLeod; J Michałowski; A Mignerey; J Mülmenstädt; M Neal; R Nouicer; A Olszewski; R Pak; I C Park; M Patel; H Pernegger; M Plesko; C Reed; L P Remsberg; M Reuter; C Roland; G Roland; D Ross; L Rosenberg; J Ryan; A Sanzgiri; P Sarin; P Sawicki; J Scaduto; J Shea; J Sinacore; W Skulski; S G Steadman; G S Stephans; P Steinberg; A Straczek; M Stodulski; M Strek; Z Stopa; A Sukhanov; K Surowiecka; J L Tang; R Teng; A Trzupek; C Vale; G J van Nieuwenhuizen; R Verdier; B Wadsworth; F L Wolfs; B Wosiek; K Woźniak; A H Wuosmaa; B Wysłouch; K Zalewski; P Zychowski; PHOBOS Collaboration

doi:10.1103/PhysRevLett.85.3100

Charged-particle multiplicity near midrapidity in central Au+Au collisions at sqrt[SNN]=56 and 130 GeV

Phys Rev Lett. 2000 Oct 9;85(15):3100-4. doi: 10.1103/PhysRevLett.85.3100.

Authors

B B Back¹, M D Baker, D S Barton, S Basilev, B D Bates, R Baum, R R Betts, A Białas, R Bindel, W Bogucki, A Budzanowski, W Busza, A Carroll, M Ceglia, Y H Chang, A E Chen, T Coghen, C Conner, W Czyz, B Dabrowski, M P Decowski, M Despet, P Fita, J Fitch, M Friedl, K Gałuszka, R Ganz, E Garcia, N George, J Godlewski, C Gomes, E Griesmayer, K Gulbrandsen, S Gushue, J Halik, C Halliwell, P Haridas, A Hayes, G A Heintzelman, C Henderson, R Hollis, R Hołyński, B Holzman, E Johnson, J Kane, J Katzy, W Kita, J Kotuła, H Kraner, W Kucewicz, P Kulinich, C LawV, M Lemler, J Ligocki, W T Lin, S Manly, D McLeod, J Michałowski, A Mignerey, J Mülmenstädt, M Neal, R Nouicer, A Olszewski, R Pak, I C Park, M Patel, H Pernegger, M Plesko, C Reed, L P Remsberg, M Reuter, C Roland, G Roland, D Ross, L Rosenberg, J Ryan, A Sanzgiri, P Sarin, P Sawicki, J Scaduto, J Shea, J Sinacore, W Skulski, S G Steadman, G S Stephans, P Steinberg, A Straczek, M Stodulski, M Strek, Z Stopa, A Sukhanov, K Surowiecka, J L Tang, R Teng, A Trzupek, C Vale, G J van Nieuwenhuizen, R Verdier, B Wadsworth, F L Wolfs, B Wosiek, K Woźniak, A H Wuosmaa, B Wysłouch, K Zalewski, P Zychowski; PHOBOS Collaboration

Affiliation

¹ Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843, USA.

PMID: 11019276
DOI: 10.1103/PhysRevLett.85.3100

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.