Azimuthal Charged-Particle Correlations and Possible Local Strong Parity Violation
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
18/04/2012
18/04/2012
2009
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Resumo |
Parity-odd domains, corresponding to nontrivial topological solutions of the QCD vacuum, might be created during relativistic heavy-ion collisions. These domains are predicted to lead to charge separation of quarks along the system's orbital momentum axis. We investigate a three-particle azimuthal correlator which is a P even observable, but directly sensitive to the charge separation effect. We report measurements of charged hadrons near center-of-mass rapidity with this observable in Au+Au and Cu+Cu collisions at s(NN)=200 GeV using the STAR detector. A signal consistent with several expectations from the theory is detected. We discuss possible contributions from other effects that are not related to parity violation. Offices of NP and HEP within the U.S. DOE Office of Science U.S. NSF National Science Foundation Sloan Foundation Deutsche Forschungsgemeinschaft - DFG cluster of excellence Centre National de la Recherche Scientifique - CNRS/IN2P3 STFC and 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 and MSMT of the Czech Republic FOM and NOW of the Netherlands (DAE) Department of Atomic Energy, India (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 Rep. Of Croatia MES Russian Ministry of Sci. and Tech RosAtom of Russia |
Identificador |
PHYSICAL REVIEW LETTERS, v.103, n.25, 2009 0031-9007 http://producao.usp.br/handle/BDPI/16309 10.1103/PhysRevLett.103.251601 |
Idioma(s) |
eng |
Publicador |
AMER PHYSICAL SOC |
Relação |
Physical Review Letters |
Direitos |
restrictedAccess Copyright AMER PHYSICAL SOC |
Palavras-Chave | #HEAVY-ION COLLISIONS #NUCLEAR COLLISIONS #HOT QCD #Physics, Multidisciplinary |
Tipo |
article original article publishedVersion |