Identified Baryon and meson distributions at large transverse momenta from Au+Au collisions at VsNN=200 GeV

Y. Bai; F. Benedosso; M.A.J. Botje; J. Castillo; O. Grebenyuk; A. Mischke; T. Peitzmann; M.J. Russcher; R.J.M. Snellings; N. van der Kolk

Identified Baryon and meson distributions at large transverse momenta from Au+Au collisions at VsNN=200 GeV

Y. Bai, F. Benedosso, M.A.J. Botje, J. Castillo, O. Grebenyuk, A. Mischke, T. Peitzmann, M.J. Russcher, R.J.M. Snellings, N. van der Kolk

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Abstract

Transverse momentum spectra of π±, p, and p̅ up to 12 GeV/c at midrapidity in centrality selected Au+Au collisions at VsNN=200 GeV are presented. In central Au+Au collisions, both π± and p(p̅ ) show significant suppression with respect to binary scaling at pT≳4 GeV/c. Protons and antiprotons are less suppressed than π±, in the range 1.5≲pT≲6 GeV/c. The π-/π+ and p̅ /p ratios show at most a weak pT dependence and no significant centrality dependence. The p/π ratios in central Au+Au collisions approach the values in p+p and d+Au collisions at pT≳5 GeV/c. The results at high pT indicate that the partonic sources of π±, p, and p̅ have similar energy loss when traversing the nuclear medium.

Original language	Undefined/Unknown
Pages (from-to)	152301/1-152301/6
Number of pages	6
Journal	Physical Review Letters
Volume	97
Issue number	15
Publication status	Published - 2006

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@article{9dd4f007cc344557bb6800c392bd3c77,

title = "Identified Baryon and meson distributions at large transverse momenta from Au+Au collisions at VsNN=200 GeV",

abstract = "Transverse momentum spectra of π±, p, and p̅ up to 12 GeV/c at midrapidity in centrality selected Au+Au collisions at VsNN=200 GeV are presented. In central Au+Au collisions, both π± and p(p̅ ) show significant suppression with respect to binary scaling at pT≳4 GeV/c. Protons and antiprotons are less suppressed than π±, in the range 1.5≲pT≲6 GeV/c. The π-/π+ and p̅ /p ratios show at most a weak pT dependence and no significant centrality dependence. The p/π ratios in central Au+Au collisions approach the values in p+p and d+Au collisions at pT≳5 GeV/c. The results at high pT indicate that the partonic sources of π±, p, and p̅ have similar energy loss when traversing the nuclear medium.",

author = "Y. Bai and F. Benedosso and M.A.J. Botje and J. Castillo and O. Grebenyuk and A. Mischke and T. Peitzmann and M.J. Russcher and R.J.M. Snellings and {van der Kolk}, N.",

note = "STAR Collaboration",

year = "2006",

language = "Undefined/Unknown",

volume = "97",

pages = "152301/1--152301/6",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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TY - JOUR

T1 - Identified Baryon and meson distributions at large transverse momenta from Au+Au collisions at VsNN=200 GeV

AU - Bai, Y.

AU - Benedosso, F.

AU - Botje, M.A.J.

AU - Castillo, J.

AU - Grebenyuk, O.

AU - Mischke, A.

AU - Peitzmann, T.

AU - Russcher, M.J.

AU - Snellings, R.J.M.

AU - van der Kolk, N.

N1 - STAR Collaboration

PY - 2006

Y1 - 2006

N2 - Transverse momentum spectra of π±, p, and p̅ up to 12 GeV/c at midrapidity in centrality selected Au+Au collisions at VsNN=200 GeV are presented. In central Au+Au collisions, both π± and p(p̅ ) show significant suppression with respect to binary scaling at pT≳4 GeV/c. Protons and antiprotons are less suppressed than π±, in the range 1.5≲pT≲6 GeV/c. The π-/π+ and p̅ /p ratios show at most a weak pT dependence and no significant centrality dependence. The p/π ratios in central Au+Au collisions approach the values in p+p and d+Au collisions at pT≳5 GeV/c. The results at high pT indicate that the partonic sources of π±, p, and p̅ have similar energy loss when traversing the nuclear medium.

AB - Transverse momentum spectra of π±, p, and p̅ up to 12 GeV/c at midrapidity in centrality selected Au+Au collisions at VsNN=200 GeV are presented. In central Au+Au collisions, both π± and p(p̅ ) show significant suppression with respect to binary scaling at pT≳4 GeV/c. Protons and antiprotons are less suppressed than π±, in the range 1.5≲pT≲6 GeV/c. The π-/π+ and p̅ /p ratios show at most a weak pT dependence and no significant centrality dependence. The p/π ratios in central Au+Au collisions approach the values in p+p and d+Au collisions at pT≳5 GeV/c. The results at high pT indicate that the partonic sources of π±, p, and p̅ have similar energy loss when traversing the nuclear medium.

M3 - Article

SN - 0031-9007

VL - 97

SP - 152301/1-152301/6

JO - Physical Review Letters

JF - Physical Review Letters

IS - 15

ER -