Identified Hadron Compositions in p plus p and Au plus Au Collisions at High Transverse Momenta at root s(NN)=200 GeV
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
24/10/2013
24/10/2013
2012
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Resumo |
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. Offices of NP and HEP within the U.S. DOE Office of Science Offices of NP and HEP within the U.S. DOE Office of Science U.S. NSF U.S. NSF Sloan Foundation Sloan Foundation DFG cluster of excellence "Origin and Structure of the Universe" of Germany DFG cluster of excellence Origin and Structure of the Universe of Germany STFC of the United Kingdom STFC of the United Kingdom CNRS/IN2P3 CNRS/IN2P3 FAPESP CNPq of Brazil FAPESP CNPq of Brazil Ministry of Ed. and Sci. of the Russian Federation Ministry of Ed. and Sci. of the Russian Federation NNSFC NNSFC CAS CAS MoST MoST MoE of China MoE of China GA of the Czech Republic GA of the Czech Republic MSMT of the Czech Republic MSMT of the Czech Republic FOM of The Netherlands FOM of the Netherlands NWO of the Netherlands NWO of The Netherlands DAE DAE DAE, DST DAE, DST CSIR of India CSIR of India Polish Ministry of Sci. and Higher Ed. Polish Ministry of Sci. and Higher Ed. Korea Research Foundation Korea Research Foundation Ministry of Sci., Ed. and Sports of the Rep. of Croatia Ministry of Sci., Ed. and Sports of the Rep. of Croatia RosAtom of Russia RosAtom of Russia |
Identificador |
PHYSICAL REVIEW LETTERS, COLLEGE PK, v. 108, n. 6, supl. 1, Part 1, pp. 82-90, FEB 14, 2012 0031-9007 http://www.producao.usp.br/handle/BDPI/35785 10.1103/PhysRevLett.108.072302 |
Idioma(s) |
eng |
Publicador |
AMER PHYSICAL SOC COLLEGE PK |
Relação |
PHYSICAL REVIEW LETTERS |
Direitos |
openAccess Copyright AMER PHYSICAL SOC |
Palavras-Chave | #QUARK-GLUON PLASMA #SPECTRA #COLLABORATION #PERSPECTIVE #MATTER #PHYSICS, MULTIDISCIPLINARY |
Tipo |
article original article publishedVersion |