First Evidence of the Decay B + → π + e + e −

Physical Review Letters, vol. 137, pp. 071804

Abstract

The first evidence for the decay B^{+}→π^{+}e^{+}e^{-} is reported using proton-proton collision data recorded by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb^{-1}. A signal excess with a significance of 3.2σ is observed and the branching fraction is measured to be B(B^{+}→π^{+}e^{+}e^{-})=(2.4_{-0.8}^{+0.9} _{-0.2}^{+0.4})×10^{-8}, where the first set of uncertainties is statistical and the second is systematic. The result is consistent with the Standard Model expectation.

Authors 99

1. R. Aaij

   National Institute for Subatomic Physics

   Affiliation as printed

   Nikhef National Institute for Subatomic Physics

2. A. S. W. Abdelmotteleb

   University of Warwick

   Affiliation as printed

   University of Warwick

3. Carlos Abellán Beteta

   University of Zurich

   Affiliation as printed

   Universität Zürich

4. C. Abellán Beteta

   University of Warwick

   Affiliation as printed

   University of Warwick

5. T. Ackernley

   University of Liverpool

   Affiliation as printed

   University of Liverpool

6. A. A. Adefisoye

   Syracuse University

   Affiliation as printed

   Syracuse University

7. B. Adeva

   Universidade de Santiago de Compostela

   Affiliation as printed

   Universidade de Santiago de Compostela

8. M. Adinolfi

   University of Bristol

   Affiliation as printed

   University of Bristol

9. P. Adlarson

   Uppsala University · University of Glasgow

   Affiliation as printed

   University of Glasgow

   Uppsala University

10. C. Agapopoulou

    Université Paris-Saclay

    Affiliation as printed

    Université Paris-Saclay

11. C. Aidala

    University of Michigan · Syracuse University

    Affiliation as printed

    Syracuse University

    University of Michigan

12. Z. Ajaltouni

    Université Clermont Auvergne

    Affiliation as printed

    Université Clermont Auvergne

13. S. Akar

    Université Clermont Auvergne

    Affiliation as printed

    Université Clermont Auvergne

14. K. Carvalho Akiba

    National Institute for Subatomic Physics

    Affiliation as printed

    Nikhef National Institute for Subatomic Physics

15. Muzammil Akthar

    AGH University of Krakow

    Affiliation as printed

    AGH - University of Krakow

16. P. Albicocco

    Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati

    Affiliation as printed

    INFN Laboratori Nazionali di Frascati

17. J. Albrecht

    TU Dortmund University

    Affiliation as printed

    Technische Universität Dortmund

18. R. Aleksiejūnas

    University of Freiburg · Vilnius University

    Affiliation as printed

    Albert-Ludwigs-Universität Freiburg

    Vilnius University

19. F. Alessio

    European Organization for Nuclear Research

    Affiliation as printed

    European Organization for Nuclear Research (CERN)

20. P. Álvarez Cartelle

    Universidade de Santiago de Compostela

    Affiliation as printed

    Cavendish Laboratory

    Universidade de Santiago de Compostela

21. R. Amalric

    Sorbonne Université

    Affiliation as printed

    Sorbonne Université

22. S. Amato

    Universidade Federal do Rio de Janeiro

    Affiliation as printed

    Universidade Federal do Rio de Janeiro (UFRJ)

23. Y. Amhis

    Université Paris-Saclay

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    Université Paris-Saclay

24. Liupan An

    Peking University

    Affiliation as printed

    Peking University

25. L. Anderlini

    Istituto Nazionale di Fisica Nucleare, Sezione di Firenze

    Affiliation as printed

    INFN Sezione di Firenze

26. M. Andersson

    University of Zurich

    Affiliation as printed

    Universität Zürich

27. P. Andreola

    University of Zurich

    Affiliation as printed

    Universität Zürich

28. M. Andreotti

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

    Affiliation as printed

    INFN Sezione di Ferrara

29. Sergio Andres Estrada

    Universidade da Coruña

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    Universidade da Coruña

30. Alessia Anelli

    Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca

    Affiliation as printed

    INFN Sezione di Milano-Bicocca

31. D. Ao

    University of Chinese Academy of Sciences

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    University of Chinese Academy of Sciences

32. C. Arata

    Université Paris-Saclay

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    Université Paris-Saclay

33. F. Archilli

    Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata

    Affiliation as printed

    INFN Sezione di Roma Tor Vergata

34. Zaratsyan Areg

    Syracuse University

    Affiliation as printed

    Syracuse University

35. Matteo Argenton

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

    Affiliation as printed

    INFN Sezione di Ferrara

36. S. Arguedas Cuendis

    Consejo Nacional de Rectores · European Organization for Nuclear Research

    Affiliation as printed

    Consejo Nacional de Rectores (CONARE)

    European Organization for Nuclear Research (CERN)

37. Lisa Arnone

    Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca

    Affiliation as printed

    INFN Sezione di Milano-Bicocca

38. A. Artamonov

    European Organization for Nuclear Research

    Affiliation as printed

    CERN

39. M. Artuso

    Syracuse University

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    Syracuse University

40. E. Aslanides

    Aix-Marseille Université

    Affiliation as printed

    Aix Marseille Univ

41. R. Ataíde Da Silva
    Affiliation as printed

    Institute of Physics

42. M. Atzeni

    Massachusetts Institute of Technology

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    Massachusetts Institute of Technology

43. B. Audurier

    Université Paris-Saclay

    Affiliation as printed

    Université Paris-Saclay

44. Juliette Authier

    Laboratoire Leprince-Ringuet

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    Laboratoire Leprince-Ringuet

45. D. Bacher

    University of Oxford

    Affiliation as printed

    University of Oxford

46. I. Bachiller
    Affiliation as printed

    Institute of Physics

47. S. Bachmann

    Heidelberg University

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    Ruprecht-Karls-Universität Heidelberg

48. Marie Bachmayer
    Affiliation as printed

    Institute of Physics

49. John J Back

    University of Warwick

    Affiliation as printed

    University of Warwick

50. P. Baladrón Rodríguez

    Universidade de Santiago de Compostela

    Affiliation as printed

    Universidade de Santiago de Compostela

51. V. Balagura

    Laboratoire Leprince-Ringuet

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    Laboratoire Leprince-Ringuet

52. A Balboni

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

    Affiliation as printed

    INFN Sezione di Ferrara

53. W. Baldini

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

    Affiliation as printed

    INFN Sezione di Ferrara

54. Zachary Baldwin

    TU Dortmund University · Ruhr University Bochum

    Affiliation as printed

    Ruhr Universitaet Bochum

    Technische Universität Dortmund

55. Luca Balzani

    TU Dortmund University

    Affiliation as printed

    Technische Universität Dortmund

56. H. Bao

    University of Chinese Academy of Sciences

    Affiliation as printed

    University of Chinese Academy of Sciences

57. J. Baptista de Souza Leite

    Centro Brasileiro de Pesquisas Físicas

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    Centro Brasileiro de Pesquisas Físicas (CBPF)

58. C. Barbero Pretel

    Universidade de Santiago de Compostela · Université Paris-Saclay

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    Universidade de Santiago de Compostela

    Université Paris-Saclay

59. M. Barbetti

    Istituto Nazionale di Fisica Nucleare, Sezione di Firenze

    Affiliation as printed

    INFN Sezione di Firenze

60. I. R. Barbosa

    Universidade Federal do Rio de Janeiro · Pontifícia Universidade Católica do Rio de Janeiro

    Affiliation as printed

    Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio)

    Universidade Federal do Rio de Janeiro (UFRJ)

61. Roger John Barlow

    University of Manchester

    Affiliation as printed

    University of Manchester

62. Mikhail Barnyakov

    Istituto Nazionale di Fisica Nucleare, Sezione di Bologna

    Affiliation as printed

    INFN Sezione di Bologna

63. S. Barsuk

    Université Paris-Saclay

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    Université Paris-Saclay

64. W. Barter

    University of Edinburgh

    Affiliation as printed

    University of Edinburgh

65. W. Barter

    Syracuse University

    Affiliation as printed

    Syracuse University

66. B. Batsukh

    AGH University of Krakow

    Affiliation as printed

    AGH - University of Krakow

67. B. Batsukh

    Institute for High Energy Physics · Institute of High Energy Physics

    Affiliation as printed

    Institute Of High Energy Physics (IHEP)

68. Piera Battista

    Université Paris-Saclay

    Affiliation as printed

    Université Paris-Saclay

69. A. Bay
    Affiliation as printed

    Institute of Physics

70. A. Beck

    Massachusetts Institute of Technology

    Affiliation as printed

    Massachusetts Institute of Technology

71. M. Becker

    TU Dortmund University

    Affiliation as printed

    Technische Universität Dortmund

72. F. Bedeschi

    Istituto Nazionale di Fisica Nucleare, Sezione di Pisa

    Affiliation as printed

    INFN Sezione di Pisa

73. I. Bediaga

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Físicas (CBPF)

74. Noah Albin Behling

    TU Dortmund University

    Affiliation as printed

    Technische Universität Dortmund

75. S. Belin

    Universidade de Santiago de Compostela

    Affiliation as printed

    Universidade de Santiago de Compostela

76. Alberto Bellavista

    Istituto Nazionale di Fisica Nucleare, Sezione di Bologna

    Affiliation as printed

    INFN Sezione di Bologna

77. K. Belous

    European Organization for Nuclear Research

    Affiliation as printed

    CERN

78. I. Belov

    Istituto Nazionale di Fisica Nucleare, Sezione di Genova

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    INFN Sezione di Genova

79. I. Belyaev

    Istituto Nazionale di Fisica Nucleare, Sezione di Roma I

    Affiliation as printed

    INFN Sezione di Roma La Sapienza

80. G. Benane

    Aix-Marseille Université

    Affiliation as printed

    Aix Marseille Univ

81. G. Bencivenni

    Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati

    Affiliation as printed

    INFN Laboratori Nazionali di Frascati

82. E. Ben-Haim

    Sorbonne Université

    Affiliation as printed

    Sorbonne Université

83. Alexander Berezhnoy

    European Organization for Nuclear Research

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    CERN

84. R. Bernet

    University of Zurich

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    Universität Zürich

85. H. C. Bernstein

    Universitat Ramon Llull

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    Universitat Ramon Llull

86. A. Bertolin

    Istituto Nazionale di Fisica Nucleare, Sezione di Padova

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    INFN Sezione di Padova

87. F. Betti

    University of Edinburgh

    Affiliation as printed

    University of Edinburgh

88. J. Bex
    Affiliation as printed

    Cavendish Laboratory

89. Oleg Bezshyyko

    Taras Shevchenko National University of Kyiv · Université Paris-Saclay

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    Taras Schevchenko University of Kyiv

    Université Paris-Saclay

90. Senjuti Bhattacharya

    Eötvös Loránd University · European Organization for Nuclear Research

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    Eotvos Lorand University

    European Organization for Nuclear Research (CERN)

91. M. S. Bieker

    University of Bonn

    Affiliation as printed

    Universität Bonn - Helmholtz-Institut für Strahlen und Kernphysik

92. N. V. Biesuz

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

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    INFN Sezione di Ferrara

93. Alice Biolchini

    National Institute for Subatomic Physics

    Affiliation as printed

    Nikhef National Institute for Subatomic Physics

94. M. Birch

    Imperial College London

    Affiliation as printed

    Imperial College London

95. F. C. R. Bishop

    Université Savoie Mont Blanc

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    Université Savoie Mont Blanc

96. A. Bitadze

    University of Manchester

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    University of Manchester

97. A. Bizzeti

    Istituto Nazionale di Fisica Nucleare, Sezione di Firenze

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    INFN Sezione di Firenze

98. T. Blake

    University of Warwick

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    University of Warwick

99. F. Blanc
    Affiliation as printed

    Institute of Physics