Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.082001
Keywords
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Funding
- Department of Science and Technology, South Africa
- Calouste Gulbenkian Foundation from Lisbon
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Swiss Fonds Kidagan, Armenia
- Financiadora de Estudos e Projetos (FINEP)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
- National Natural Science Foundation of China (NSFC)
- Chinese Ministry of Education (CMOE)
- Ministry of Science and Technology of China (MSTC)
- Ministry of Education and Youth of the Czech Republic
- Danish Natural Science Research Council
- Carlsberg Foundation
- Danish National Research Foundation
- European Research Council under European Community
- Helsinki Institute of Physics
- Academy of Finland
- French CNRS [IN2P3]
- Region Pays de Loire
- Region Alsace
- Region Auvergne
- CEA, France
- German BMBF
- Helmholtz Association
- General Secretariat for Research and Technology
- Ministry of Development, Greece
- Hungarian OTKA
- National Office for Research and Technology (NKTH)
- Department of Atomic Energy
- Department of Science and Technology of Government of India
- Istituto Nazionale di Fisica Nucleare (INFN) of Italy
- MEXT, Japan
- Joint Institute for Nuclear Research, Dubna
- National Research Foundation of Korea (NRF)
- CONACYT
- DGAPA, Mexico
- ALFA-EC
- HELEN (High-Energy physics Latin-American-European Network)
- Stichting voor Fundamenteel Onderzoek der Materie (FOM)
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
- The Netherlands
- Research Council of Norway (NFR)
- Polish Ministry of Science and Higher Education
- 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
- International Science and Technology Center, Russian Academy of Sciences
- Russian Federal Agency of Atomic Energy, Russian Federal Agency for Science and Innovations
- CERN-INTAS
- Ministry of Education of Slovakia
- CIEMAT
- EELA
- Ministerio de Educacion y Ciencia of Spain
- Xunta de Galicia (Conselleria de Educacion)
- CEADEN
- Cubaenergia, Cuba
- IAEA (International Atomic Energy Agency)
- Swedish Research Council
- Knut and Alice Wallenberg Foundation
- Ukraine Ministry of Education and Science
- United Kingdom Science and Technology Facilities Council (STFC)
- The United States Department of Energy
- United States National Science Foundation
- State of Texas
- State of Ohio
- Science and Technology Facilities Council [ALICE, ST/J000140/1, GRIDPP] Funding Source: researchfish
- STFC [ALICE, ST/J000140/1] Funding Source: UKRI
- Grants-in-Aid for Scientific Research [23340074, 20224014] Funding Source: KAKEN
- Direct For Mathematical & Physical Scien
- Division Of Physics [0968903] Funding Source: National Science Foundation
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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.
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