Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/55865

Download PDF (Accepted manuscript) (Adobe Acrobat PDF, -1 bytes)

Title

Centrality dependence of charged particle multiplicity at midrapidity in Au+Au collisions at sqrt[SNN]=130 GeV

Author(s)

Back, B. B.;  Baker, M. D.;  Barton, D. S.;  Betts, R. R.;  Bindel, R.;  Budzanowski, A.;  Busza, W.;  Carroll, A.;  Decowski, M. P.;  Garcia, E.;  George, N.;  Gulbrandsen, K.;  Gushue, S.;  Halliwell, C.;  Heintzelman, G. A.;  Henderson, C.;  Holynski, R.;  Hofman, D. J.;  Holzman, B.;  Johnson, E.;  Kane, J. L.;  Katzy, J.;  Khan, N.;  Kucewicz, W.;  Kulinich, P.;  Lin, W. T.;  Manly, S.;  McLeod, D.;  Michalowski, J.;  Mignerey, A. C.;  Mulmenstadt, J.;  Nouicer, R.;  Olszewski, A.;  Pak, R.;  Park, I. C.;  Pernegger, H.;  Reed, C.;  Remsberg, L. P.;  Reuter, M.;  Roland, C.;  Roland, G.;  Rosenberg, L.;  Sarin, P.;  Sawicki, P.;  Skulski, W.;  Steadman, S. G.;  Stephans, G. S. F.;  Steinberg, P.;  Stodulski, M.;  Sukhanov, A.;  Tang, J. L.;  Teng, R.;  Trzupek, A.;  Vale, C.;  Van Nieuwenhuizen, G. J.;  Verdier, R.;  Wadsworth, B.;  Wolfs, F. L. H.;  Wosiek, B.;  Wozniak, K.;  Wuosmaa, A. H.;  Wyslouch, B.

Abstract

We present a measurement of the pseudorapidity density of primary charged particles near midrapidity in Au+Au collisions at sqrt[SNN]=130 GeV as a function of the number of participating nucleons. The pseudorapidity density, dNch/dη||η|≤1/(1/2〈Npart〉) , rises from 2.87±0.21 in peripheral events (〈Npart〉∼83) to 3.45±0.18 in central events (〈Npart〉∼ 353), which is 53±8% higher than pp̄ collisions at a similar center-of-mass energy. This is consistent with an additional contribution to charged particle production that scales with the number of binary nucleon-nucleon collisions (Ncoll).

Publication type

Journal article

Source

Physical Review C, Vol. 65, no. 3 (Mar 2002), Article no. 031901

Publication year

2002

FOR Code(s)

0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics

Keyword(s)

Charged particles;  PHOBOS

Publisher

American Physical Society

ISSN

0556-2813

Publisher URL

http://dx.doi.org/10.1103/PhysRevC.65.031901

Copyright

Copyright © 2002 American Physical Society. The accepted manuscript is reproduced in accordance with the copyright policy of the publisher.

Full text

Peer reviewed