Search for A^{'}→μ^{+}μ^{-} Decays
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 INFN Laboratori Nazionali di Frascati, Frascati, Italy.
- 11 Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany.
- 12 European Organization for Nuclear Research (CERN), Geneva, Switzerland.
- 13 School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
- 14 ICCUB, Universitat de Barcelona, Barcelona, Spain.
- 15 Petersburg Nuclear Physics Institute NRC Kurchatov Institute (PNPI NRC KI), Gatchina, Russia.
- 16 Imperial College London, London, United Kingdom.
- 17 Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.
- 18 LAL, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, France.
- 19 INFN Sezione di Firenze, Firenze, Italy.
- 20 Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
- 21 INFN Sezione di Ferrara, Ferrara, Italy.
- 22 Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.
- 23 Aix Marseille Université, CNRS/IN2P3, CPPM, Marseille, France.
- 24 Institute for High Energy Physics NRC Kurchatov Institute (IHEP NRC KI), Protvino, Russia.
- 25 Syracuse University, Syracuse, New York, USA.
- 26 Yandex School of Data Analysis, Moscow, Russia.
- 27 INFN Sezione di Cagliari, Monserrato, Italy.
- 28 Department of Physics, University of Warwick, Coventry, United Kingdom.
- 29 Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom.
- 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 INFN Sezione di Pisa, Pisa, Italy.
- 33 National Center for Nuclear Research (NCBJ), Warsaw, Poland.
- 34 Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil.
- 35 University of Chinese Academy of Sciences, Beijing, China.
- 36 Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia.
- 37 LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France.
- 38 I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany.
- 39 Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia.
- 40 INFN Sezione di Padova, Padova, Italy.
- 41 INFN Sezione di Bologna, Bologna, Italy.
- 42 Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom.
- 43 Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland.
- 44 University of Birmingham, Birmingham, United Kingdom.
- 45 Department of Physics, University of Oxford, Oxford, United Kingdom.
- 46 INFN Sezione di Roma La Sapienza, Roma, Italy.
- 47 Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
- 48 National Research University Higher School of Economics, Moscow, Russia (associated with Yandex School of Data Analysis, Moscow, Russia).
- 49 Budker Institute of Nuclear Physics (SB RAS), Novosibirsk, Russia.
- 50 School of Physics and Technology, Wuhan University, Wuhan, China (associated with Center for High Energy Physics, Tsinghua University, Beijing, China).
- 51 INFN Sezione di Milano-Bicocca, Milano, Italy.
- 52 INFN Sezione di Roma Tor Vergata, Roma, Italy.
- 53 Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IN2P3-LAPP, Annecy, France.
- 54 Center for High Energy Physics, Tsinghua University, Beijing, China.
- 55 School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom.
- 56 Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania.
- 57 Los Alamos National Laboratory (LANL), Los Alamos, New Mexico, USA.
- 58 INFN Sezione di Bari, Bari, Italy.
- 59 Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany.
- 60 AGH-University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
- 61 Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China.
- 62 NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine.
- 63 STFC Rutherford Appleton Laboratory, Didcot, United Kingdom.
- 64 Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS), Moscow, Russia.
- 65 University of Maryland, College Park, Maryland, USA.
- 66 School of Physics State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China.
- 67 Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia-CSIC, Valencia, Spain.
- 68 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].
- 69 Institute Of High Energy Physics (IHEP), Beijing, China.
- 70 Laboratory of Mathematical and Subatomic Physics, Constantine, Algeria [associated with Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil].
- 71 Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, Netherlands.
- 72 National Research Tomsk Polytechnic University, Tomsk, Russia [associated with Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia].
- 73 Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine.
- 74 South China Normal University, Guangzhou, China (associated with Center for High Energy Physics, Tsinghua University, Beijing, China).
- 75 National Research Centre Kurchatov Institute, Moscow, Russia [associated with Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia].
- 76 School of Physics, University College Dublin, Dublin, Ireland.
- 77 Institut für Physik, Universität Rostock, Rostock, Germany (associated with Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany).
- 78 Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia (associated with LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France).
- 79 Van Swinderen Institute, University of Groningen, Groningen, Netherlands (associated with Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands).
- PMID: 32058729
- DOI: 10.1103/PhysRevLett.124.041801
Search for A^{'}→μ^{+}μ^{-} Decays
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 INFN Laboratori Nazionali di Frascati, Frascati, Italy.
- 11 Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany.
- 12 European Organization for Nuclear Research (CERN), Geneva, Switzerland.
- 13 School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
- 14 ICCUB, Universitat de Barcelona, Barcelona, Spain.
- 15 Petersburg Nuclear Physics Institute NRC Kurchatov Institute (PNPI NRC KI), Gatchina, Russia.
- 16 Imperial College London, London, United Kingdom.
- 17 Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.
- 18 LAL, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, France.
- 19 INFN Sezione di Firenze, Firenze, Italy.
- 20 Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
- 21 INFN Sezione di Ferrara, Ferrara, Italy.
- 22 Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.
- 23 Aix Marseille Université, CNRS/IN2P3, CPPM, Marseille, France.
- 24 Institute for High Energy Physics NRC Kurchatov Institute (IHEP NRC KI), Protvino, Russia.
- 25 Syracuse University, Syracuse, New York, USA.
- 26 Yandex School of Data Analysis, Moscow, Russia.
- 27 INFN Sezione di Cagliari, Monserrato, Italy.
- 28 Department of Physics, University of Warwick, Coventry, United Kingdom.
- 29 Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom.
- 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 INFN Sezione di Pisa, Pisa, Italy.
- 33 National Center for Nuclear Research (NCBJ), Warsaw, Poland.
- 34 Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil.
- 35 University of Chinese Academy of Sciences, Beijing, China.
- 36 Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia.
- 37 LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France.
- 38 I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany.
- 39 Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia.
- 40 INFN Sezione di Padova, Padova, Italy.
- 41 INFN Sezione di Bologna, Bologna, Italy.
- 42 Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom.
- 43 Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland.
- 44 University of Birmingham, Birmingham, United Kingdom.
- 45 Department of Physics, University of Oxford, Oxford, United Kingdom.
- 46 INFN Sezione di Roma La Sapienza, Roma, Italy.
- 47 Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
- 48 National Research University Higher School of Economics, Moscow, Russia (associated with Yandex School of Data Analysis, Moscow, Russia).
- 49 Budker Institute of Nuclear Physics (SB RAS), Novosibirsk, Russia.
- 50 School of Physics and Technology, Wuhan University, Wuhan, China (associated with Center for High Energy Physics, Tsinghua University, Beijing, China).
- 51 INFN Sezione di Milano-Bicocca, Milano, Italy.
- 52 INFN Sezione di Roma Tor Vergata, Roma, Italy.
- 53 Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IN2P3-LAPP, Annecy, France.
- 54 Center for High Energy Physics, Tsinghua University, Beijing, China.
- 55 School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom.
- 56 Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania.
- 57 Los Alamos National Laboratory (LANL), Los Alamos, New Mexico, USA.
- 58 INFN Sezione di Bari, Bari, Italy.
- 59 Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany.
- 60 AGH-University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland.
- 61 Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China.
- 62 NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine.
- 63 STFC Rutherford Appleton Laboratory, Didcot, United Kingdom.
- 64 Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS), Moscow, Russia.
- 65 University of Maryland, College Park, Maryland, USA.
- 66 School of Physics State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China.
- 67 Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia-CSIC, Valencia, Spain.
- 68 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].
- 69 Institute Of High Energy Physics (IHEP), Beijing, China.
- 70 Laboratory of Mathematical and Subatomic Physics, Constantine, Algeria [associated with Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil].
- 71 Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, Netherlands.
- 72 National Research Tomsk Polytechnic University, Tomsk, Russia [associated with Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia].
- 73 Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine.
- 74 South China Normal University, Guangzhou, China (associated with Center for High Energy Physics, Tsinghua University, Beijing, China).
- 75 National Research Centre Kurchatov Institute, Moscow, Russia [associated with Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia].
- 76 School of Physics, University College Dublin, Dublin, Ireland.
- 77 Institut für Physik, Universität Rostock, Rostock, Germany (associated with Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany).
- 78 Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia (associated with LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France).
- 79 Van Swinderen Institute, University of Groningen, Groningen, Netherlands (associated with Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands).
- PMID: 32058729
- DOI: 10.1103/PhysRevLett.124.041801
Abstract
Searches are performed for both promptlike and long-lived dark photons, A^{'}, produced in proton-proton collisions at a center-of-mass energy of 13 TeV. These searches look for A^{'}→μ^{+}μ^{-} decays using a data sample corresponding to an integrated luminosity of 5.5 fb^{-1} collected with the LHCb detector. Neither search finds evidence for a signal, and 90% confidence-level exclusion limits are placed on the γ-A^{'} kinetic mixing strength. The promptlike A^{'} search explores the mass region from near the dimuon threshold up to 70 GeV and places the most stringent constraints to date on dark photons with 214<m(A^{'})≲740 MeV and 10.6<m(A^{'})≲30 GeV. The search for long-lived A^{'}→μ^{+}μ^{-} decays places world-leading constraints on low-mass dark photons with lifetimes O(1) ps.
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