LHCb Collaboration (Including: Back, J. J., Craik, Daniel, Dossett, D., Gershon, T. J., Harrison, P. F., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Whitehead, M. (Mark) and Williams, M. P.). (2013) Observation of Dº - D-º oscillations. Physical Review Letters, Volume 110 (Number 10). Article number 101802 . doi:10.1103/PhysRevLett.110.101802 ISSN 0031-9007.

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Abstract

We report a measurement of the time-dependent ratio of Dº- → K+ π- to Dº- → K- π+ decay rates in D*+-tagged events using 1:0 fb(-1) of integrated luminosity recorded by the LHCb experiment. We measure the mixing parameters x´² = (-0:9 ± 1:3) x10-(4), y´= (7:2 ± 2:4) x 10(-3), and the ratio of doubly- Cabibbo- suppressed to Cabibbo-favored decay rates RD = (3.52 ± 0:15) x 10(-3), where the uncertainties include statistical and systematic sources. The result excludes the no-mixing hypothesis with a probability corresponding to 9.1 standard deviations and represents the first observation of Dº- - D-º oscillations from a single measurement

Item Type:	Journal Article
Alternative Title:
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Mathematical physics, Nuclear counters, Nuclear physics -- Research
Journal or Publication Title:	Physical Review Letters
Publisher:	American Physical Society
ISSN:	0031-9007
Official Date:	April 2013
Dates:	Date Event April 2013 Published
Volume:	Volume 110
Number:	Number 10
Page Range:	Article number 101802
DOI:	10.1103/PhysRevLett.110.101802
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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