LCHb Collaboration (Including: Back, J. J., Blake, Thomas, Craik, Daniel, Crocombe, Andrew, Dossett, D., Gershon, T. J., Kreps, Michal, Langenbruch, Christoph, Latham, Thomas, O'Hanlon, D. P., Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Wallace, Charlotte and Whitehead, M. (Mark)). (2015) Angular analysis of the B 0 → K *0 e + e − decay in the low-q 2 region. Journal of High Energy Physics, 2015 (4). pp. 1-22. 64. doi:10.1007/JHEP04(2015)064 ISSN 1029-8479.

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Abstract

An angular analysis of the B 0 → K *0 e + e − decay is performed using a data sample, corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV during 2011 and 2012. For the first time several observables are measured in the dielectron mass squared (q 2) interval between 0.002 and 1.120 GeV2 /c 4. The angular observables F L and A T Re which are related to the K *0 polarisation and to the lepton forward-backward asymmetry, are measured to be F L = 0.16 ± 0.06 ± 0.03 and A T Re  = 0.10 ± 0.18 ± 0.05, where the first uncertainty is statistical and the second systematic. The angular observables A T (2) and A T Im which are sensitive to the photon polarisation in this q 2 range, are found to be A T (2)  = − 0.23 ± 0.23 ± 0.05 and A T Im  = 0.14 ± 0.22 ± 0.05. The results are consistent with Standard Model predictions.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Quantum flavor dynamics
Journal or Publication Title:	Journal of High Energy Physics
Publisher:	Springer
ISSN:	1029-8479
Official Date:	14 April 2015
Dates:	Date Event 14 April 2015 Published
Volume:	2015
Number:	4
Number of Pages:	22
Page Range:	pp. 1-22
Article Number:	64
DOI:	10.1007/JHEP04(2015)064
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access (Creative Commons)
Date of first compliant deposit:	22 December 2015
Date of first compliant Open Access:	27 January 2016
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), 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], 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), Poland. Ministerstwo Nauki i Szkolnictwa Wyższego [Ministry of Science and Higher Education] (MNiSW), Narodowe Centrum Nauki (NCN), Institutul de Fizică Atomică (IFA), MinES, Russia (Federation). Federal Agency of Scientific Organizations (FANO), Spain. Ministerio de Economía y Competitividad [Ministry of Economy and Competitiveness] (MINECO), Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung [Swiss National Science Foundation] (SNSF), Switzerland. Staatssekretariat für Ausbildung und Forschung (SER), Nat︠s︡ionalʹna akademii︠a︡ nauk Ukraïny [National Academy of Sciences of Ukraine] (NASU), Science and Technology Facilities Council (Great Britain) (STFC), National Science Foundation (U.S.) (NSF), Karlsruher Institut für Technologie (KIT), SURF, European Particle physics Latin American NETwork (EPLANET), Marie Skłodowska-Curie actions, European Research Council (ERC), Conseil général de Haute-Savoie, Labex ENIGMASS, Origines Constituants & Evolution de l'Univers (OCEVU), Auvergne (France), Rossiĭskiĭ fond fundamentalʹnykh issledovaniĭ [Russian Foundation for Basic Research] (RFBR), Galicia (Spain : Region). Xunta, Royal Society (Great Britain), Great Britain. Royal Commission for the Exhibition of 1851

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