Transition in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
18/04/2012
18/04/2012
2010
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| Resumo |
Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of pi(0) trigger particles at transverse momenta p(T)(t) = 4-12 GeV/c and associated charged hadrons (p(T)(a) = 0.5-7 GeV/c) vs relative azimuthal angle Delta phi in Au + Au and p + p collisions at root s(NN) = 200 GeV. The Au + Au distribution at low p(T)(a), whose shape has been interpreted as a medium effect, is modified for p(T)(t) < 7 GeV/c. At higher p(T)(t), the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured p(T)(a), which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au + Au relative to p + p (I(AA)) is suppressed at high p(T) (I(AA) approximate to 0.35-0.5), but less than for inclusive suppression (R(AA) approximate to 0.2). Office of Nuclear Physics in DOE Office of Science National Science Foundation NSF Renaissance Technologies (USA) MEXT JSPS - Japan Society for the Promotion of Science (Japan) CNPq FAPESP (Brazil) NSFC (China) MSMT (Czech Republic) 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 (DST) Department of Science and Technology, India ISF - Israel Science Foundation (Israel) NRF (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 US-Hungary Fulbright (BSF) US-Israel Binational Science Foundation |
| Identificador |
PHYSICAL REVIEW LETTERS, v.104, n.25, 2010 0031-9007 http://producao.usp.br/handle/BDPI/16073 10.1103/PhysRevLett.104.252301 |
| Idioma(s) |
eng |
| Publicador |
AMER PHYSICAL SOC |
| Relação |
Physical Review Letters |
| Direitos |
restrictedAccess Copyright AMER PHYSICAL SOC |
| Palavras-Chave | #Physics, Multidisciplinary |
| Tipo |
article original article publishedVersion |