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Centrality dependence of charged-hadron transverse-momentum spectra in d + Au collisions at square root SNN = 200 GeV

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posted on 2024-08-06, 12:36 authored by B. B. Back, M. D. Baker, M. Ballintijn, D. S. Barton, B. Becker, R. R. Betts, A. A. Bickley, R Bindel, A. Budzanowski, W. Busza, A. S. Carroll, M. P. Decowski, E. M. Garcia, T. Gburek, N. K. George, K. H. Gulbrandsen, S. Gushue, C. M. Halliwell, J. Hamblen, A. S. Harrington, C. Henderson, D. J. Hofman, R. S. Hollis, R. Holynski, B. Holzman, A. Iordanova, E. E. Johnson, J. L. Kane, N. Khan, P. A. Kulinich, C. M. Kuo, J. W. Lee, W. T. Lin, S. L. Manly, A. C. Mignerey, A. Noell, R. Nouicer, A. Olszewski, R. Pak, I. C. Park, H. Pernegger, C. Reed, L. P. Remsberg, C. Roland, G. Roland, J. Sagerer, P. Sarin, P. Sawicki, I. Sedykh, W. Skulski, C. E. Smith, P. A. Steinberg, G. S. F. Stephans, A. V. Sukhanov, R. Teng, M. B. Tonjes, A. Trzupek, C. Vale, G. J. van Nieuwenhuizen, R. Verdier, G. I. Veres, B. F. Wadsworth, F. L. H. Wolfs, B. Wosiek, K. Wozniak, A. H. Wuosmaa, B. Wyslouch, J. Zhang
We have measured transverse momentum distributions of charged hadrons produced in d+Au collisions at sqrt(s_NN) = 200 GeV. The spectra were obtained for transverse momenta 0.25 < p_T < 6.0 GeV/c, in a pseudorapidity range of 0.2 < eta < 1.4 in the deuteron direction. The evolution of the spectra with collision centrality is presented in comparison to p+pbarcollisions at the same collision energy. With increasing centrality, the yield at high transverse momenta increases more rapidly than the overall particle density, leading to a strong modification of the spectral shape. This change in spectral shape is qualitatively different from observations in Au+Au collisions at the same energy. The results provide important information for discriminating between different models for the suppression of high-p_T hadrons observed in Au+Au collisions.

Funding

United States Department of Energy

Directorate for Mathematical & Physical Sciences

Directorate for Geosciences

History

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PDF (Accepted manuscript)

ISSN

0031-9007

Journal title

Physical Review Letters

Volume

91

Issue

7

Pagination

3 pp

Publisher

American Physical Society

Copyright statement

Copyright © 2003 The American Physical Society. The accepted manuscript is reproduced in accordance with the copyright policy of the publisher.

Language

eng

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