First Observation of the Decay B_{s}^{0}→K^{-}μ^{+}ν_{μ} and a Measurement of |V_{ub}|/|V_{cb}|
Affiliations
- 1 Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands.
- 2 Physik-Institut, Universität Zürich, Zürich, Switzerland.
- 3 Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom.
- 4 Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
- 5 H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom.
- 6 Université Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, France.
- 7 University of Michigan, Ann Arbor, Michigan, USA (associated with Syracuse University, Syracuse, New York, USA).
- 8 INFN Sezione di Milano, Milano, Italy.
- 9 University of Cincinnati, Cincinnati, Ohio, USA.
- 10 Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany.
- 11 European Organization for Nuclear Research (CERN), Geneva, Switzerland.
- 12 School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
- 13 ICCUB, Universitat de Barcelona, Barcelona, Spain.
- 14 Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom.
- 15 Petersburg Nuclear Physics Institute NRC Kurchatov Institute (PNPI NRC KI), Gatchina, Russia.
- 16 Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.
- 17 Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France.
- 18 INFN Sezione di Firenze, Firenze, Italy.
- 19 INFN Sezione di Ferrara, Ferrara, Italy.
- 20 Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.
- 21 Institute for High Energy Physics NRC Kurchatov Institute (IHEP NRC KI), Protvino, Russia, Protvino, Russia.
- 22 Syracuse University, Syracuse, New York, USA.
- 23 Yandex School of Data Analysis, Moscow, Russia.
- 24 Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France.
- 25 Laboratoire Leprince-ringuet (llr), Palaiseau, France.
- 26 Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
- 27 Department of Physics, University of Warwick, Coventry, United Kingdom.
- 28 Imperial College London, London, United Kingdom.
- 29 Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil.
- 30 INFN Sezione di Genova, Genova, Italy.
- 31 National University of Science and Technology "MISIS", Moscow, Russia [associated with Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia].
- 32 I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany.
- 33 INFN Sezione di Pisa, Pisa, Italy.
- 34 INFN Sezione di Cagliari, Monserrato, Italy.
- 35 Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia.
- 36 Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia.
- 37 INFN Laboratori Nazionali di Frascati, Frascati, Italy.
- 38 LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France.
- 39 Universita degli Studi di Padova, Universita e INFN, Padova, Padova, Italy.
- 40 INFN Sezione di Bologna, Bologna, Italy.
- 41 Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom.
- 42 Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland.
- 43 School of Physics and Technology, Wuhan University, Wuhan, China (associated with Center for High Energy Physics, Tsinghua University, Beijing, China).
- 44 University of Birmingham, Birmingham, United Kingdom.
- 45 Department of Physics, University of Oxford, Oxford, United Kingdom.
- 46 Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
- 47 National Research University Higher School of Economics, Moscow, Russia (associated with Yandex School of Data Analysis, Moscow, Russia).
- 48 Budker Institute of Nuclear Physics (SB RAS), Novosibirsk, Russia.
- 49 University of Maryland, College Park, Maryland, USA.
- 50 Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS), Moscow, Russia.
- 51 INFN Sezione di Milano-Bicocca, Milano, Italy.
- 52 DS4DS, La Salle, Universitat Ramon Llull, Barcelona, Spain (associated with ICCUB, Universitat de Barcelona, Barcelona, Spain).
- 53 University of Chinese Academy of Sciences, Beijing, China.
- 54 INFN Sezione di Roma Tor Vergata, Roma, Italy.
- 55 Institute Of High Energy Physics (IHEP), Beijing, China.
- 56 Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IN2P3-LAPP, Annecy, France.
- 57 Center for High Energy Physics, Tsinghua University, Beijing, China.
- 58 School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom.
- 59 Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania.
- 60 INFN Sezione di Bari, Bari, Italy.
- 61 Los Alamos National Laboratory (LANL), Los Alamos, United States.
- 62 Van Swinderen Institute, University of Groningen, Groningen, Netherlands (associated with Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands).
- 63 Universiteit Maastricht, Maastricht, Netherlands (associated with Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands).
- 64 AGH-University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
- 65 Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine.
- 66 School of Physics, University College Dublin, Dublin, Ireland.
- 67 NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine.
- 68 INFN Sezione di Perugia, Perugia, Italy (associated with INFN Sezione di Ferrara, Ferrara, Italy).
- 69 STFC Rutherford Appleton Laboratory, Didcot, United Kingdom.
- 70 School of Physics and Astronomy, Monash University, Melbourne, Australia (associated with Department of Physics, University of Warwick, Coventry, United Kingdom).
- 71 School of Physics State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China.
- 72 Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil [associated with Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil].
- 73 Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China.
- 74 Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia-CSIC, Valencia, Spain.
- 75 Guangdong Provencial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, Guangzhou, China (associated with Center for High Energy Physics, Tsinghua University, Beijing, China).
- 76 Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, Netherlands.
- 77 National Research Tomsk Polytechnic University, Tomsk, Russia [associated with Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia].
- 78 National Center for Nuclear Research (NCBJ), Warsaw, Poland.
- 79 INFN Sezione di Roma La Sapienza, Roma, Italy.
- 80 National Research Centre Kurchatov Institute, Moscow, Russia [associated with Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia].
- 81 Institut für Physik, Universität Rostock, Rostock, Germany (associated with Physikalisches Institut, Ruprecht-Karls-Universitat Heidelberg, Heidelberg, Germany).
- 82 Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia (associated with LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cite, CNRS/IN2P3, Paris, France).
- 83 Universität Bonn-Helmholtz-Institut für Strahlen und Kernphysik, Bonn, Germany (associated with Physikalisches Institut, Ruprecht-Karls-Universitat Heidelberg, Heidelberg, Germany).
- 84 Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany.
- 85 Physics and Micro Electronic College, Hunan University, Changsha City, China (associated with Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China).
- PMID: 33709730
- DOI: 10.1103/PhysRevLett.126.081804
First Observation of the Decay B_{s}^{0}→K^{-}μ^{+}ν_{μ} and a Measurement of |V_{ub}|/|V_{cb}|
Authors
Affiliations
- 1 Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands.
- 2 Physik-Institut, Universität Zürich, Zürich, Switzerland.
- 3 Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom.
- 4 Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
- 5 H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom.
- 6 Université Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, France.
- 7 University of Michigan, Ann Arbor, Michigan, USA (associated with Syracuse University, Syracuse, New York, USA).
- 8 INFN Sezione di Milano, Milano, Italy.
- 9 University of Cincinnati, Cincinnati, Ohio, USA.
- 10 Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany.
- 11 European Organization for Nuclear Research (CERN), Geneva, Switzerland.
- 12 School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
- 13 ICCUB, Universitat de Barcelona, Barcelona, Spain.
- 14 Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom.
- 15 Petersburg Nuclear Physics Institute NRC Kurchatov Institute (PNPI NRC KI), Gatchina, Russia.
- 16 Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.
- 17 Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France.
- 18 INFN Sezione di Firenze, Firenze, Italy.
- 19 INFN Sezione di Ferrara, Ferrara, Italy.
- 20 Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.
- 21 Institute for High Energy Physics NRC Kurchatov Institute (IHEP NRC KI), Protvino, Russia, Protvino, Russia.
- 22 Syracuse University, Syracuse, New York, USA.
- 23 Yandex School of Data Analysis, Moscow, Russia.
- 24 Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France.
- 25 Laboratoire Leprince-ringuet (llr), Palaiseau, France.
- 26 Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
- 27 Department of Physics, University of Warwick, Coventry, United Kingdom.
- 28 Imperial College London, London, United Kingdom.
- 29 Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil.
- 30 INFN Sezione di Genova, Genova, Italy.
- 31 National University of Science and Technology "MISIS", Moscow, Russia [associated with Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia].
- 32 I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany.
- 33 INFN Sezione di Pisa, Pisa, Italy.
- 34 INFN Sezione di Cagliari, Monserrato, Italy.
- 35 Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia.
- 36 Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia.
- 37 INFN Laboratori Nazionali di Frascati, Frascati, Italy.
- 38 LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France.
- 39 Universita degli Studi di Padova, Universita e INFN, Padova, Padova, Italy.
- 40 INFN Sezione di Bologna, Bologna, Italy.
- 41 Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom.
- 42 Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland.
- 43 School of Physics and Technology, Wuhan University, Wuhan, China (associated with Center for High Energy Physics, Tsinghua University, Beijing, China).
- 44 University of Birmingham, Birmingham, United Kingdom.
- 45 Department of Physics, University of Oxford, Oxford, United Kingdom.
- 46 Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
- 47 National Research University Higher School of Economics, Moscow, Russia (associated with Yandex School of Data Analysis, Moscow, Russia).
- 48 Budker Institute of Nuclear Physics (SB RAS), Novosibirsk, Russia.
- 49 University of Maryland, College Park, Maryland, USA.
- 50 Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS), Moscow, Russia.
- 51 INFN Sezione di Milano-Bicocca, Milano, Italy.
- 52 DS4DS, La Salle, Universitat Ramon Llull, Barcelona, Spain (associated with ICCUB, Universitat de Barcelona, Barcelona, Spain).
- 53 University of Chinese Academy of Sciences, Beijing, China.
- 54 INFN Sezione di Roma Tor Vergata, Roma, Italy.
- 55 Institute Of High Energy Physics (IHEP), Beijing, China.
- 56 Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IN2P3-LAPP, Annecy, France.
- 57 Center for High Energy Physics, Tsinghua University, Beijing, China.
- 58 School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom.
- 59 Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania.
- 60 INFN Sezione di Bari, Bari, Italy.
- 61 Los Alamos National Laboratory (LANL), Los Alamos, United States.
- 62 Van Swinderen Institute, University of Groningen, Groningen, Netherlands (associated with Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands).
- 63 Universiteit Maastricht, Maastricht, Netherlands (associated with Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands).
- 64 AGH-University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
- 65 Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine.
- 66 School of Physics, University College Dublin, Dublin, Ireland.
- 67 NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine.
- 68 INFN Sezione di Perugia, Perugia, Italy (associated with INFN Sezione di Ferrara, Ferrara, Italy).
- 69 STFC Rutherford Appleton Laboratory, Didcot, United Kingdom.
- 70 School of Physics and Astronomy, Monash University, Melbourne, Australia (associated with Department of Physics, University of Warwick, Coventry, United Kingdom).
- 71 School of Physics State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China.
- 72 Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil [associated with Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil].
- 73 Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China.
- 74 Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia-CSIC, Valencia, Spain.
- 75 Guangdong Provencial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, Guangzhou, China (associated with Center for High Energy Physics, Tsinghua University, Beijing, China).
- 76 Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, Netherlands.
- 77 National Research Tomsk Polytechnic University, Tomsk, Russia [associated with Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia].
- 78 National Center for Nuclear Research (NCBJ), Warsaw, Poland.
- 79 INFN Sezione di Roma La Sapienza, Roma, Italy.
- 80 National Research Centre Kurchatov Institute, Moscow, Russia [associated with Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia].
- 81 Institut für Physik, Universität Rostock, Rostock, Germany (associated with Physikalisches Institut, Ruprecht-Karls-Universitat Heidelberg, Heidelberg, Germany).
- 82 Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia (associated with LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cite, CNRS/IN2P3, Paris, France).
- 83 Universität Bonn-Helmholtz-Institut für Strahlen und Kernphysik, Bonn, Germany (associated with Physikalisches Institut, Ruprecht-Karls-Universitat Heidelberg, Heidelberg, Germany).
- 84 Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany.
- 85 Physics and Micro Electronic College, Hunan University, Changsha City, China (associated with Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China).
- PMID: 33709730
- DOI: 10.1103/PhysRevLett.126.081804
Abstract
The first observation of the suppressed semileptonic B_{s}^{0}→K^{-}μ^{+}ν_{μ} decay is reported. Using a data sample recorded in pp collisions in 2012 with the LHCb detector, corresponding to an integrated luminosity of 2 fb^{-1}, the branching fraction B(B_{s}^{0}→K^{-}μ^{+}ν_{μ}) is measured to be [1.06±0.05(stat)±0.08(syst)]×10^{-4}, where the first uncertainty is statistical and the second one represents the combined systematic uncertainties. The decay B_{s}^{0}→D_{s}^{-}μ^{+}ν_{μ}, where D_{s}^{-} is reconstructed in the final state K^{+}K^{-}π^{-}, is used as a normalization channel to minimize the experimental systematic uncertainty. Theoretical calculations on the form factors of the B_{s}^{0}→K^{-} and B_{s}^{0}→D_{s}^{-} transitions are employed to determine the ratio of the Cabibbo-Kobayashi-Maskawa matrix elements |V_{ub}|/|V_{cb}| at low and high B_{s}^{0}→K^{-} momentum transfer.
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