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First observation of the decay B*s2(5840)º →B*+K- and studies of excited Bºs

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LHCb Collaboration (Including: Back, J. J., Craik, Daniel, Dossett, D., Gershon, T. J., Harrison, P. F., Kreps, Michal, Latham, Thomas, Reid, Matthew M., Silva Coutinho, R., Pilar, T., Poluektov, Anton, Whitehead, M. (Mark) and Williams, M. P.). (2013) First observation of the decay B*s2(5840)º →B*+K- and studies of excited Bºs. Physical Review Letters, Volume 110 (Number 15). Article number 151803. doi:10.1103/PhysRevLett.110.151803 ISSN 0031-9007.

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.110.151803

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Abstract

The properties of the orbitally excited (L=1) Bºs states are studied by using 1.0  fb-1 of pp collisions at √s=7  TeV collected with the LHCb detector. The first observation of the B*s2(5840)º meson decaying to B*+K- is reported, and the corresponding branching fraction measured relative to the B+K- decay mode. The Bs1(5830)º →B*+K- decay is observed as well. The width of the B*s2(5840)º state is measured for the first time, and the masses of the two states are determined with the highest precision to date. The observation of the B*s2(5840)º →B*+K- decay favors the spin-parity assignment JP=2+ for the B*s2(5840)º meson. In addition, the most precise measurement of the mass difference m(B*+)-m(B+)=45.01±0.30(stat)±0.23(syst)  MeV/c2 is obtained.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Mathematical physics, Nuclear counters , Mesons -- Decay
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 2013
Dates:
DateEvent
2013Published
Volume: Volume 110
Number: Number 15
Page Range: Article number 151803
DOI: 10.1103/PhysRevLett.110.151803
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 25 December 2015
Date of first compliant Open Access: 25 December 2015
Funder: 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), European Organization for Nuclear Research (CERN), 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), Germany. Bundesministerium für Bildung und Forschung (BMBF), 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) , Autoritatea Nationala pentru Cercetare Stiintifica (ANCS), Federalʹnoe agentstvo po atomnoĭ ėnergii (Russia), Russia (Federation). Ministerstvo obrazovanii︠a︡ i nauki [Ministry of Education and Science], Spain. Ministerio de Ciencia e Innovación (MICINN), Galicia (Spain : Region). Xunta, Catalonia (Spain), Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung [Swiss National Science Foundation] (SNSF), Natsionalʹna akademiia nauk Ukraïny (NAS), Science and Technology Facilities Council (Great Britain) (STFC), National Science Foundation (U.S.) (NSF), European Research Council (ERC), Seventh Framework Programme (European Commission) (FP7), Auvergne (France), Deutsche Forschungsgemeinschaft (DFG), 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), Switzerland. Staatssekretariat für Ausbildung und Forschung (SER)

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