Charged Kaon Interferometric Probes of Space-Time Evolution in Au plus Au Collisions at s(NN)=200 GeV
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
---|---|
Data(s) |
18/04/2012
18/04/2012
2009
|
Resumo |
Bose-Einstein correlations of charged kaons are used to probe Au+Au collisions at s(NN)=200 GeV and are compared to charged pion probes, which have a larger hadronic scattering cross section. Three-dimensional Gaussian source radii are extracted, along with a one-dimensional kaon emission source function. The centrality dependences of the three Gaussian radii are well described by a single linear function of N(part)(1/3) with a zero intercept. Imaging analysis shows a deviation from a Gaussian tail at r greater than or similar to 10 fm, although the bulk emission at lower radius is well described by a Gaussian. The presence of a non-Gaussian tail in the kaon source reaffirms that the particle emission region in a heavy-ion collision is extended, and that similar measurements with pions are not solely due to the decay of long-lived resonances. Department of Energy (DOE) National Science Foundation NSF (USA) MEXT JSPS - Japan Society for the Promotion of Science (Japan) CNPq FAPESP (Brazil) NSFC (China) Centre National de la Recherche Scientifique - IN2P3/CNRS CEA (France) BMBF - Bundesministerium fur Bildung und Forschung, Germany (DAAD) Deutscher Akademischer Austausch Dienst, Germany Alexander von Humboldt Foundation (Germany) OTKA (Hungary) (DAE) Department of Atomic Energy, India ISF - Israel Science Foundation (Israel) KRF KOSEF (Korea) MES Ministry of Education and Science of the Russian Federation RAS Russia Academy of Sciences FAAE (Russia) VR (Sweden) KAW (Sweden) U. S. CRDF for the FSU U. S.-Hungarian NSF-OTKA-MTA (BSF) US-Israel Binational Science Foundation |
Identificador |
PHYSICAL REVIEW LETTERS, v.103, n.14, 2009 0031-9007 http://producao.usp.br/handle/BDPI/16091 10.1103/PhysRevLett.103.142301 |
Idioma(s) |
eng |
Publicador |
AMER PHYSICAL SOC |
Relação |
Physical Review Letters |
Direitos |
restrictedAccess Copyright AMER PHYSICAL SOC |
Palavras-Chave | #HEAVY-ION COLLISIONS #QCD PHASE-TRANSITION #BOSE-EINSTEIN #SYSTEMS #MATTER #Physics, Multidisciplinary |
Tipo |
article original article publishedVersion |