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Test of lepton universality using b+ → K+ℓ+ℓ- decays.
Aaij, R; Adeva, B; Adinolfi, M; Affolder, A; Ajaltouni, Z; Akar, S; Albrecht, J; Alessio, F; Alexander, M; Ali, S; Alkhazov, G; Alvarez Cartelle, P; Alves, A A; Amato, S; Amerio, S; Amhis, Y; An, L; Anderlini, L; Anderson, J; Andreassen, R; Andreotti, M; Andrews, J E; Appleby, R B; Aquines Gutierrez, O; Archilli, F; Artamonov, A; Artuso, M; Aslanides, E; Auriemma, G; Baalouch, M; Bachmann, S; Back, J J; Badalov, A; Balagura, V; Baldini, W; Barlow, R J; Barschel, C; Barsuk, S; Barter, W; Batozskaya, V; Battista, V; Bay, A; Beaucourt, L; Beddow, J; Bedeschi, F; Bediaga, I; Belogurov, S; Belous, K; Belyaev, I; Ben-Haim, E.
Afiliação
  • Aaij R; Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands.
  • Adeva B; Universidad de Santiago de Compostela, Santiago de Compostela, Spain.
  • Adinolfi M; H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom.
  • Affolder A; Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom.
  • Ajaltouni Z; Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand, France.
  • Akar S; CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France.
  • Albrecht J; Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany.
  • Alessio F; European Organization for Nuclear Research (CERN), Geneva, Switzerland.
  • Alexander M; School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
  • Ali S; Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands.
  • Alkhazov G; Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia.
  • Alvarez Cartelle P; Universidad de Santiago de Compostela, Santiago de Compostela, Spain.
  • Alves AA; Sezione INFN di Roma La Sapienza, Roma, Italy and European Organization for Nuclear Research (CERN), Geneva, Switzerland.
  • Amato S; Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.
  • Amerio S; Sezione INFN di Padova, Padova, Italy.
  • Amhis Y; LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France.
  • An L; Center for High Energy Physics, Tsinghua University, Beijing, China.
  • Anderlini L; Sezione INFN di Firenze, Firenze, Italy.
  • Anderson J; Physik-Institut, Universität Zürich, Zürich, Switzerland.
  • Andreassen R; University of Cincinnati, Cincinnati, Ohio, USA.
  • Andreotti M; Sezione INFN di Ferrara, Ferrara, Italy.
  • Andrews JE; University of Maryland, College Park, Maryland, USA.
  • Appleby RB; School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom.
  • Aquines Gutierrez O; Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany.
  • Archilli F; European Organization for Nuclear Research (CERN), Geneva, Switzerland.
  • Artamonov A; Institute for High Energy Physics (IHEP), Protvino, Russia.
  • Artuso M; Syracuse University, Syracuse, New York, USA.
  • Aslanides E; CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France.
  • Auriemma G; Sezione INFN di Roma La Sapienza, Roma, Italy.
  • Baalouch M; Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand, France.
  • Bachmann S; Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.
  • Back JJ; Department of Physics, University of Warwick, Coventry, United Kingdom.
  • Badalov A; Universitat de Barcelona, Barcelona, Spain.
  • Balagura V; Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia.
  • Baldini W; Sezione INFN di Ferrara, Ferrara, Italy.
  • Barlow RJ; School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom.
  • Barschel C; European Organization for Nuclear Research (CERN), Geneva, Switzerland.
  • Barsuk S; LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France.
  • Barter W; Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom.
  • Batozskaya V; National Center for Nuclear Research (NCBJ), Warsaw, Poland.
  • Battista V; Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
  • Bay A; Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
  • Beaucourt L; LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France.
  • Beddow J; School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
  • Bedeschi F; Sezione INFN di Pisa, Pisa, Italy.
  • Bediaga I; Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil.
  • Belogurov S; Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia.
  • Belous K; Institute for High Energy Physics (IHEP), Protvino, Russia.
  • Belyaev I; Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia.
  • Ben-Haim E; LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France.
Phys Rev Lett ; 113(15): 151601, 2014 Oct 10.
Article em En | MEDLINE | ID: mdl-25375701
ABSTRACT
A measurement of the ratio of the branching fractions of the B(+) → K(+)µ(+)µ(-) and B(+) → K(+)e(+)e(-) decays is presented using proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb(-1), recorded with the LHCb experiment at center-of-mass energies of 7 and 8 TeV. The value of the ratio of branching fractions for the dilepton invariant mass squared range 1 < q(2) < 6 GeV(2)/c(4) is measured to be 0.745(-0.074)(+0.090)(stat) ± 0.036(syst). This value is the most precise measurement of the ratio of branching fractions to date and is compatible with the standard model prediction within 2.6 standard deviations.
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Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Ano de publicação: 2014 Tipo de documento: Article
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Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Ano de publicação: 2014 Tipo de documento: Article