Longitudinal spin transfer to Lambda and Lambda hyperons in polarized proton-proton collisions at s=200 GeV
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
18/04/2012
18/04/2012
2009
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Resumo |
The longitudinal spin transfer, D(LL), from high energy polarized protons to Lambda and Lambda hyperons has been measured for the first time in proton-proton collisions at s=200 GeV with the STAR detector at the Relativistic Heavy Ion Collider. The measurements cover pseudorapidity, eta, in the range |eta|< 1.2 and transverse momenta, p(T), up to 4 GeV/c. The longitudinal spin transfer is found to be D(LL)=-0.03 +/- 0.13(stat)+/- 0.04(syst) for inclusive Lambda and D(LL)=-0.12 +/- 0.08(stat)+/- 0.03(syst) for inclusive Lambda hyperons with <<eta >>=0.5 and << p(T)>>=3.7 GeV/c. The dependence on eta and p(T) is presented. U.S. Department of Energy (DOE), Offices of NP and HEP U. S. NSF National Science Foundation Sloan Foundation Deutsche Forschungsgemeinschaft - DFG Centre National de la Recherche Scientifique - CNRS[CNRS/IN2P3] STFC EPSRC of the United Kingdom PESP CNPq of Brazil MES Ministry of Education and Science of the Russian Federation National Natural Science Foundation of China (NNSFC) CAS of China MoST of China MoE of China, GA MSMT of the Czech Republic FOM of the Netherlands NOWof 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 Science and Higher Education Korea Research Foundation (KRF) Ministry of Science, Education and Sports of the Republic Of Croatia MES Russian Ministry of Science and Technology RosAtom of Russia |
Identificador |
PHYSICAL REVIEW D, v.80, n.11, 2009 1550-7998 http://producao.usp.br/handle/BDPI/16314 10.1103/PhysRevD.80.111102 |
Idioma(s) |
eng |
Publicador |
AMER PHYSICAL SOC |
Relação |
Physical Review D |
Direitos |
restrictedAccess Copyright AMER PHYSICAL SOC |
Palavras-Chave | #CHARGED CURRENT INTERACTIONS #PP COLLISIONS #(LAMBDA)OVER-BAR POLARIZATION #BARYON PRODUCTION #NOMAD EXPERIMENT #SCATTERING #DECAYS #DEEP #Astronomy & Astrophysics #Physics, Particles & Fields |
Tipo |
article original article publishedVersion |