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Title

Particle production at very low transverse momenta in Au+Au collisions at sqrt[SNN]=200 GeV

Author(s)

Back, B. B.;  Baker, M. D.;  Ballintijn, M.;  Barton, D. S.;  Betts, R. R.;  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.;  Manly, S.;  McLeod, D.;  Mignerey, A. C.;  Nouicer, R.;  Olszewski, 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.;  Trzupek, A.;  Vale, C.;  Van Nieuwenhuizen, G. J.;  Verdier, R.;  Wolfs, F. L. H.;  Wosiek, B.;  Wozniak, K.;  Wuosmaa, A. H.;  Wyslouch, B.

Abstract

We present results on charged particle production at very low transverse momenta in the 15% most central Au+Au collisions at sqrt[sNN]=200 GeV obtained with the PHOBOS detector at the Relativistic Heavy Ion Collider. The invariant yields were measured at midrapidity in the transverse momentum ranges from 30 to 50 MeV/c for charged pions, 90 to 130 MeV/c for charged kaons and 140 to 210 MeV/c for protons and antiprotons. No significant enhancement in low transverse momentum particle production is observed as compared to extrapolations of identified particle spectra measured at an intermediate pT range. The spectra tend to flatten at low pT, consistent with the expectations of transverse expansion of the system.

Publication type

Journal article

Source

Physical Review C, Vol. 70, no. 5 (2004), Article no. 051901

Publication year

2004

FOR Code(s)

0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics

Keyword(s)

Charged particles;  PHOBOS;  Relativistic Heavy Ion Collider

Publisher

American Physical Society

ISSN

0556-2813

Publisher URL

http://dx.doi.org/10.1103/PhysRevC.70.051901

Copyright

Copyright © 2004 American Physical Society. The accepted manuscript is reproduced in accordance with the copyright policy of the publisher.

Full text

Peer reviewed