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

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posted on 2024-08-06, 12:34 authored by B. B. Back, M. D. Baker, M. Ballintijn, D. S. Barton, R. R. Betts, A. A. Bickley, R. Bindel, A. Budzanowski, W. Busza, A. Carroll, M. P. Decowski, E. Garcia, N. George, K. Gulbrandsen, S. Gushue, C. Halliwell, J. Hamblen, G. A. Heintzelman, C. Henderson, D. J. Hofman, R. S. Hollis, R. Holynski, B. Holzman, A. Iordanova, E. Johnson, J. L. Kane, J. Katzy, N. Khan, W. Kucewicz, P. Kulinich, C. M. Kuo, W. T. Lin, S. Manly, D. McLeod, A. C. Mignerey, R. Nouicer, A. Olszewski, R. Pak, I. C. Park, H. Pernegger, C. Reed, L. P. Remsberg, M. Reuter, C. Roland, G. Roland, L. Rosenberg, J. Sagerer, P. Sarin, P. Sawicki, W. Skulski, S. G. Steadman, P. Steinberg, G. S. F. Stephans, A. Sukhanov, J. L. Tang, A. Trzupek, C. Vale, G. J. Van Nieuwenhuizen, R. Verdier, F. L. H. Wolfs, B. Wosiek, K. Wozniak, A. H. Wuosmaa, B. Wyslouch
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.

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ISSN

0556-2813

Journal title

Physical Review C

Volume

70

Issue

5

Article number

article no. 051901

Publisher

American Physical Society

Copyright statement

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

Language

eng

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