Identified Hadron Compositions in p+p and Au+Au Collisions at High Transverse Momenta at √sNN=200 GeV
Name
Agakishiev-2012-Identified Hadron Compositions in p+p and Au+Au Collisions at High Transverse Momenta at √sNN
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314.88 KB
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Checksum (MD5)
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Author(s)
Balewski, Jan T.
Betancourt, Michael Joseph
Corliss, Ross
Hays-Wehle, James Prewitt
Leight, William Axel
Milner, Richard G.
Redwine, Robert P
Seele, J.
Steadman, Stephen G.
Surrow, Bernd
Date Issued
February 2012
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Agakishiev, G., M. M. Aggarwal, Z. Ahammed, et al. Identified Hadron Compositions in P+p and Au+Au Collisions at High Transverse Momenta at sqrt[s_{NN}]=200 GeV. Physical Review Letters 108(7). 2012. © 2012 American Physical Society
Version
Final published version
Abstract
We report transverse momentum (pT≤15 GeV/c) spectra of π[superscript ±], K[superscript ±], p, p̅ , K[subscript S][superscript 0], and ρ[superscript 0] at midrapidity in p+p and Au+Au collisions at √sNN=200 GeV. Perturbative QCD calculations are consistent with π[superscript ±] spectra in p+p collisions but do not reproduce K and p(p̅ ) spectra. The observed decreasing antiparticle-to-particle ratios with increasing p[subscript T] provide experimental evidence for varying quark and gluon jet contributions to high-p[subscript T] hadron yields. The relative hadron abundances in Au+Au at p[subscript T]≳8 GeV/c are measured to be similar to the p+p results, despite the expected Casimir effect for parton energy loss.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.108.072302
