Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.072302
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Funding
- Offices of NP and HEP within the U.S. DOE Office of Science
- U.S. NSF
- Sloan Foundation
- DFG cluster of excellence Origin and Structure of the Universe of Germany
- STFC of the United Kingdom
- CNRS/IN2P3
- FAPESP CNPq of Brazil
- Ministry of Ed. and Sci. of the Russian Federation
- NNSFC
- CAS
- MoST
- MoE of China
- GA of the Czech Republic
- MSMT of the Czech Republic
- FOM of The Netherlands
- NWO of The Netherlands
- DAE
- DAE, DST
- CSIR of India
- Polish Ministry of Sci. and Higher Ed.
- Korea Research Foundation
- Ministry of Sci., Ed. and Sports of the Rep. of Croatia
- RosAtom of Russia
- STFC [ST/J000140/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J000140/1] Funding Source: researchfish
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We report transverse momentum (p(T) <= 15 GeV/c) spectra of pi(+/-), K-+/-, p, (p) over bar, K-0(S), and rho(0) at midrapidity in p + p and Au + Au collisions at root s(NN) = 200 GeV. Perturbative QCD calculations are consistent with pi(+/-) spectra in p + p collisions but do not reproduce K and p((p) over bar) spectra. The observed decreasing antiparticle-to-particle ratios with increasing p(T) provide experimental evidence for varying quark and gluon jet contributions to high-p(T) hadron yields. The relative hadron abundances in Au + Au at p(T) >= 8 GeV/c are measured to be similar to the p + p results, despite the expected Casimir effect for parton energy loss.
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