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Title

Charged hadron transverse momentum distributions in Au + Au collisions at sqrt[SNN]=200 GeV

Author(s)

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

Abstract

We present transverse momentum distributions of charged hadrons produced in Au + Au collisions at sqrt[SNN]=200 GeV. The spectra were measured for transverse momenta pT from 0.25 to 4.5 GeV/c in a pseudorapidity range of 0.2 < η < 1.4. The evolution of the spectra is studied as a function of collision centrality, from 65 to 344 participating nucleons. The results are compared to data from proton-antiproton collisions and Au + Au collisions at lower RHIC energies. We find a significant change of the spectral shape between proton-antiproton and semi-peripheral Au + Au collisions. Comparing semi-peripheral to central Au + Au collisions, we find that the yields at high pT exhibit approximate scaling with the number of participating nucleons, rather than scaling with the number of binary collisions.

Publication type

Journal article

Source

Physics Letters B, Vol. 578, no. 3-4 (Jan 2004), pp. 297-303

Publication year

2004

FOR Code(s)

0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics

Keyword(s)

Charged hadrons;  Hadrons;  PHOBOS

Publisher

Elsevier

ISSN

0370-2693

Publisher URL

http://dx.doi.org/10.1016/j.physletb.2003.10.101

Copyright

Copyright © 2003 Elsevier B.V. The accepted manuscript of the paper is reproduced here in accordance with the copyright policy of the publisher.

Full text

Peer reviewed