K*(0) production in Cu plus Cu and Au plus Au collisions at root s(NN)=62.4 GeV and 200 GeV
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
18/04/2012
18/04/2012
2011
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| Resumo |
We report on K*(0) production at midrapidity in Au + Au and Cu + Cu collisions at root s(NN) = 62.4 and 200 GeV collected by the Solenoid Tracker at the Relativistic Heavy Ion Collider detector. The K*(0) is reconstructed via the hadronic decays K*(0) -> K(+)pi(-) and (K*(0)) over bar -> K(+)pi(-). Transverse momentum, p(T), spectra are measured over a range of p(T) extending from 0.2 GeV/c up to 5 GeV/c. The center-of-mass energy and system size dependence of the rapidity density, dN/dy, and the average transverse momentum, < p(T)>, are presented. The measured N(K*(0))/N(K) and N(phi)/N(K*(0)) ratios favor the dominance of rescattering of decay daughters of K*(0) over the hadronic regeneration for the K*(0) production. In the intermediate p(T) region (2.0 < p(T) < 4.0 GeV/c), the elliptic flow parameter, v(2), and the nuclear modification factor, R(CP), agree with the expectations from the quark coalescence model of particle production. RHIC Operations Group RCF at BNL NERSC Center at LBNL Open Science Grid consortium Offices of NP and HEP within the US DOE Office of Science US NSF National Science Foundation Sloan Foundation Deutsche Forschungsgemeinschaft - DFG of Germany Centre National de la Recherche Scientifique - CNRS/IN2P3 STFC EPSRC of the United Kingdom FAPESP CNPq of Brazil MES Ministry of Ed. and Sci. of the Russian Federation National Natural Science Foundation of China (NNSFC) CAS of China MoST of China MoE of China GACR Grant Agency of the Academy of Sciences of the Czech Republic MSMT of the Czech Republic FOM of the Netherlands NWO of The Netherlands (DAE) Department of Atomic Energy, India BRNS (DST) Department of Science and Technology, India (CSIR) Council of Scientific and Industrial Research - India Polish Ministry of Sci. and Higher Ed. Korea Research Foundation (KRF) Ministry of Sci., Ed. and Sports of the Republic of Croatia MES Russian Ministry of Sci. and Tech. RosAtom of Russia |
| Identificador |
PHYSICAL REVIEW C, v.84, n.3, 2011 0556-2813 http://producao.usp.br/handle/BDPI/16290 10.1103/PhysRevC.84.034909 |
| Idioma(s) |
eng |
| Publicador |
AMER PHYSICAL SOC |
| Relação |
Physical Review C |
| Direitos |
restrictedAccess Copyright AMER PHYSICAL SOC |
| Palavras-Chave | #HEAVY-ION COLLISIONS #QUARK-GLUON PLASMA #MESON PRODUCTION #FREEZE-OUT #ENERGY #COLLABORATION #DISTRIBUTIONS #RESTORATION #PERSPECTIVE #EXTRACTION #Physics, Nuclear |
| Tipo |
article original article publishedVersion |