LHCb Collaboration (Including: Back, J. J., Blake, Thomas, Craik, Daniel, Dossett, D., Gershon, T. J., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Wallace, Charlotte and Whitehead, M. (Mark)). (2014) Measurement of ψ(2S) polarisation in pp collisions at √s = 7 TeV. European Physical Journal C, Volume 74 (Number 5). Article number 2872. doi:10.1140/epjc/s10052-014-2872-9 ISSN 1434-6044.

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Abstract

The polarisation of prompt ψ(2S) mesons is measured by performing an angular analysis of ψ(2S) → μ+μ- decays using proton-proton collision data, corresponding to an integrated luminosity of 1.0 fb-1, collected by the LHCb detector at a centre-of-mass energy of 7 TeV. The polarisation is measured in bins of transverse momentum pT and rapidity y in the kinematic region 3.5 < pT < 15 GeV/c and 2.0 < y < 4.5, and is compared to theoretical models. No significant polarisation is observed.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Mesons -- Decay, Proton-proton interactions, Large Hadron Collider (France and Switzerland)
Journal or Publication Title:	European Physical Journal C
Publisher:	Springer
ISSN:	1434-6044
Official Date:	20 May 2014
Dates:	Date Event 20 May 2014 Published 23 April 2014 Accepted 6 March 2014 Submitted
Volume:	Volume 74
Number:	Number 5
Article Number:	Article number 2872
DOI:	10.1140/epjc/s10052-014-2872-9
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access (Creative Commons)
Date of first compliant deposit:	27 December 2015
Date of first compliant Open Access:	27 December 2015
Funder:	European Organization for Nuclear Research (CERN), Brazil. Coordenação do Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ), Financiadora de Estudos e Projetos (Brazil) (FINEP), Guo jia zi ran ke xue ji jin wei yuan hui (China) [National Natural Science Foundation of China] (NSFC), Centre national de la recherche scientifique (France) (CNRS), Institut national de physique nucléaire et de physique des particules (IN2P3), Auvergne (France), Germany. Bundesministerium für Bildung und Forschung (BMBF), Deutsche Forschungsgemeinschaft (DFG), Hermann von Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF), Max-Planck-Gesellschaft zur Förderung der Wissenschaften [Max Planck Society for the Advancement of Science], Science Foundation Ireland (SFI), Istituto nazionale di fisica nucleare (INFN), Stichting voor Fundamenteel Onderzoek der Materie (FOM) [Foundation for Fundamental Research on Matter], Nederlandse Organisatie voor Wetenschappelijk Onderzoek [Netherlands Organisation for Scientific Research] (NWO), SCSR (Poland), MEN (Romania), Institutul de Fizică Atomică (IFA), Russia (Federation). Ministerstvo obrazovanii︠a︡ i nauki [Ministry of Education and Science], Federalʹnoe agentstvo po atomnoĭ ėnergii (Russia), Rossiĭskiĭ fond fundamentalʹnykh issledovaniĭ [Russian Foundation for Basic Research] (RFBR), Rossiĭskiĭ nauchnyĭ t︠s︡entr "Kurchatovskiĭ institut" [Russian Research Center "Kurchatov Institute"] (Russia), Spain. Ministerio de Economía y Competitividad [Ministry of Economy and Competitiveness] (MINECO), Galicia (Spain : Region). Xunta, Catalonia (Spain), Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung [Swiss National Science Foundation] (SNSF), Switzerland. Staatssekretariat für Ausbildung und Forschung (SER), Nat︠s︡ionalʹna akademii︠a︡ nauk Ukraïny (NAS), Science and Technology Facilities Council (Great Britain) (STFC), National Science Foundation (U.S.) (NSF), Seventh Framework Programme (European Commission) (FP7)

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