J/psi Polarization in pp Collisions at root s=7 TeV
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
14/10/2013
14/10/2013
2012
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Resumo |
The ALICE Collaboration has studied J/psi production in pp collisions at root s = 7 TeV at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were measured, and results on the J/psi polarization parameters lambda(theta) and lambda(phi) were obtained. The study was performed in the kinematic region 2: 5 < y < 4, 2 < p(t) < 8 GeV/c, in the helicity and Collins-Soper reference frames. In both frames, the polarization parameters are compatible with zero, within uncertainties. Department of Science and Technology, South Africa Department of Science and Technology, South Africa Calouste Gulbenkian Foundation from Lisbon Calouste Gulbenkian Foundation from Lisbon Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) Swiss Fonds Kidagan, Armenia Swiss Fonds Kidagan, Armenia Financiadora de Estudos e Projetos (FINEP) Financiadora de Estudos e Projetos (FINEP) Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) National Natural Science Foundation of China (NSFC) National Natural Science Foundation of China (NSFC) Chinese Ministry of Education (CMOE) Chinese Ministry of Education (CMOE) Ministry of Science and Technology of China (MSTC) Ministry of Science and Technology of China (MSTC) Ministry of Education and Youth of the Czech Republic Ministry of Education and Youth of the Czech Republic Danish Natural Science Research Council Danish Natural Science Research Council Carlsberg Foundation Carlsberg Foundation Danish National Research Foundation Danish National Research Foundation European Research Council under European Community European Research Council under European Community Helsinki Institute of Physics Helsinki Institute of Physics Academy of Finland Academy of Finland French CNRS French CNRS [IN2P3] Region Pays de Loire Region Pays de Loire Region Alsace Region Alsace Region Auvergne Region Auvergne CEA, France CEA, France German BMBF German BMBF Helmholtz Association Helmholtz Association General Secretariat for Research and Technology General Secretariat for Research and Technology Ministry of Development, Greece Ministry of Development, Greece Hungarian OTKA Hungarian OTKA National Office for Research and Technology (NKTH) National Office for Research and Technology (NKTH) Department of Atomic Energy Department of Atomic Energy Department of Science and Technology of Government of India Department of Science and Technology of Government of India Istituto Nazionale di Fisica Nucleare (INFN) of Italy Istituto Nazionale di Fisica Nucleare (INFN) of Italy MEXT, Japan MEXT, Japan Joint Institute for Nuclear Research, Dubna Joint Institute for Nuclear Research, Dubna National Research Foundation of Korea (NRF) National Research Foundation of Korea (NRF) CONACYT CONACYT DGAPA, Mexico DGAPA, Mexico ALFAEC ALFA-EC HELEN (High-Energy physics Latin-American-European Network) HELEN (HighEnergy physics LatinAmericanEuropean Network) Stichting voor Fundamenteel Onderzoek der Materie (FOM) Stichting voor Fundamenteel Onderzoek der Materie (FOM) Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) The Netherlands The Netherlands Research Council of Norway (NFR) Research Council of Norway (NFR) Polish Ministry of Science and Higher Education Polish Ministry of Science and Higher Education National Authority for Scientific Research - NASR (Autoritatea Nationala pentru Cercetare Stiintifica - ANCS) National Authority for Scientific Research NASR (Autoritatea Nationala pentru Cercetare Stiintifica ANCS) Federal Agency of Science of the Ministry of Education and Science of Russian Federation Federal Agency of Science of the Ministry of Education and Science of Russian Federation International Science and Technology Center, Russian Academy of Sciences International Science and Technology Center, Russian Academy of Sciences Russian Federal Agency of Atomic Energy, Russian Federal Agency for Science and Innovations Russian Federal Agency of Atomic Energy, Russian Federal Agency for Science and Innovations CERNINTAS CERN-INTAS Ministry of Education of Slovakia Ministry of Education of Slovakia CIEMAT CIEMAT EELA EELA Ministerio de Educacion y Ciencia of Spain Ministerio de Educacion y Ciencia of Spain Xunta de Galicia (Conselleria de Educacion) Xunta de Galicia (Conselleria de Educacion) CEADEN CEADEN Cubaenergia, Cuba Cubaenergia, Cuba IAEA (International Atomic Energy Agency) IAEA (International Atomic Energy Agency) Swedish Research Council Swedish Research Council Knut and Alice Wallenberg Foundation Knut and Alice Wallenberg Foundation Ukraine Ministry of Education and Science Ukraine Ministry of Education and Science United Kingdom Science and Technology Facilities Council (STFC) United Kingdom Science and Technology Facilities Council (STFC) The United States Department of Energy The United States Department of Energy United States National Science Foundation United States National Science Foundation State of Texas State of Texas State of Ohio State of Ohio |
Identificador |
PHYSICAL REVIEW LETTERS, COLLEGE PK, v. 108, n. 8, supl. 1, Part 1, pp. 287-300, FEB 23, 2012 0031-9007 http://www.producao.usp.br/handle/BDPI/34576 10.1103/PhysRevLett.108.082001 |
Idioma(s) |
eng |
Publicador |
AMER PHYSICAL SOC COLLEGE PK |
Relação |
PHYSICAL REVIEW LETTERS |
Direitos |
openAccess Copyright AMER PHYSICAL SOC |
Palavras-Chave | #P(P)OVER-BAR COLLISIONS #HEAVY QUARKONIUM #QCD CORRECTIONS #S=1.8 TEV #PROMPT #PHYSICS, MULTIDISCIPLINARY |
Tipo |
article original article publishedVersion |