Search for the rare hadronic decay Bs0→pp¯

Physical review. D/Physical review. D., vol. 108

Abstract

A search for the rare hadronic decay ${B}_{s}^{0}\ensuremath{\rightarrow}p\overline{p}$ is performed using proton-proton collision data recorded by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of $6\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. No evidence of the decay is found and an upper limit on its branching fraction is set at $\mathcal{B}({B}_{s}^{0}\ensuremath{\rightarrow}p\overline{p})<4.4(5.1)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}9}$ at 90% (95%) confidence level; this is currently the world's best upper limit. The decay mode ${B}^{0}\ensuremath{\rightarrow}p\overline{p}$ is measured with very large significance, confirming the first observation by the LHCb experiment in 2017. The branching fraction is determined to be $\mathcal{B}({B}^{0}\ensuremath{\rightarrow}p\overline{p})=(1.27\ifmmode\pm\else\textpm\fi{}0.15\ifmmode\pm\else\textpm\fi{}0.05\ifmmode\pm\else\textpm\fi{}0.04)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}8}$, where the first uncertainty is statistical, the second is systematic and the third is due to the external branching fraction of the normalization channel ${B}^{0}\ensuremath{\rightarrow}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$. The combination of the two LHCb measurements of the ${B}^{0}\ensuremath{\rightarrow}p\overline{p}$ branching fraction yields $\mathcal{B}({B}^{0}\ensuremath{\rightarrow}p\overline{p})=(1.27\ifmmode\pm\else\textpm\fi{}0.13\ifmmode\pm\else\textpm\fi{}0.05\ifmmode\pm\else\textpm\fi{}0.03)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}8}$.

Authors 99

1. R. Aaij

   National Institute for Subatomic Physics

   Affiliation as printed

   Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands

2. A. S. W. Abdelmotteleb

   University of Warwick

   Affiliation as printed

   Department of Physics, University of Warwick, Coventry, United Kingdom

3. C. Abellán Beteta

   University of Zurich

   Affiliation as printed

   Physik-Institut, Universität Zürich, Zürich, Switzerland

4. F. Abudinén

   University of Warwick

   Affiliation as printed

   Department of Physics, University of Warwick, Coventry, United Kingdom

5. T. Ackernley

   University of Liverpool

   Affiliation as printed

   Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom

6. B. Adeva

   Universidade de Santiago de Compostela

   Affiliation as printed

   Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain

7. M. Adinolfi

   University of Bristol

   Affiliation as printed

   H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom

8. C. Agapopoulou

   Centre National de la Recherche Scientifique · Université Clermont Auvergne · Laboratoire de Physique de Clermont Auvergne · Institut National de Physique Nucléaire et de Physique des Particules

   Affiliation as printed

   Université Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, France

9. C. Aidala

   University of Michigan · Syracuse University

   Affiliation as printed

   University of Michigan, Ann Arbor, Michigan, USA (associated with Institution Syracuse University, Syracuse, New York, USA)

10. S. Aiola

    Istituto Nazionale di Fisica Nucleare, Sezione di Milano

    Affiliation as printed

    INFN Sezione di Milano, Milano, Italy

11. Z. Ajaltouni

    Centre National de la Recherche Scientifique · Université Clermont Auvergne · Laboratoire de Physique de Clermont Auvergne · Institut National de Physique Nucléaire et de Physique des Particules

    Affiliation as printed

    Université Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, France

12. S. Akar

    University of Cincinnati

    Affiliation as printed

    University of Cincinnati, Cincinnati, Ohio, USA

13. K. Carvalho Akiba

    National Institute for Subatomic Physics

    Affiliation as printed

    Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands

14. J. Albrecht

    TU Dortmund University

    Affiliation as printed

    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

15. F. Alessio

    European Organization for Nuclear Research

    Affiliation as printed

    European Organization for Nuclear Research (CERN), Geneva, Switzerland

16. Michael Thomas Alexander

    University of Glasgow

    Affiliation as printed

    School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom

17. A. Alfonso Albero

    Institut de Ciències del Cosmos · Universitat de Barcelona

    Affiliation as printed

    ICCUB, Universitat de Barcelona, Barcelona, Spain

18. Zakariya Aliouche

    University of Manchester

    Affiliation as printed

    Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom

19. P. Álvarez Cartelle

    University of Cambridge

    Affiliation as printed

    Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom

20. S. Amato

    Universidade Federal do Rio de Janeiro

    Affiliation as printed

    Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil

21. J. L. Amey

    University of Bristol

    Affiliation as printed

    H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom

22. Y. Amhis

    Centre National de la Recherche Scientifique · Université Paris-Saclay · Institut National de Physique Nucléaire et de Physique des Particules · Laboratoire de Physique des 2 Infinis Irène Joliot-Curie · European Organization for Nuclear Research

    Affiliation as printed

    European Organization for Nuclear Research (CERN), Geneva, Switzerland

    Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France

23. Liupan An

    TU Dortmund University · European Organization for Nuclear Research

    Affiliation as printed

    European Organization for Nuclear Research (CERN), Geneva, Switzerland

    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

24. L. Anderlini

    Istituto Nazionale di Fisica Nucleare, Sezione di Firenze

    Affiliation as printed

    INFN Sezione di Firenze, Firenze, Italy

25. M. Andersson

    University of Zurich

    Affiliation as printed

    Physik-Institut, Universität Zürich, Zürich, Switzerland

26. A. Andreianov
    Affiliation as printed

    Affiliated with an institute covered by a cooperation agreement with CERN

27. M. Andreotti

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

    Affiliation as printed

    INFN Sezione di Ferrara, Ferrara, Italy

28. D. Andreou

    Syracuse University

    Affiliation as printed

    Syracuse University, Syracuse, New York, USA

29. D. Ao

    University of Chinese Academy of Sciences

    Affiliation as printed

    University of Chinese Academy of Sciences, Beijing, China

30. F. Archilli

    Heidelberg University

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    Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany

31. A. Artamonov
    Affiliation as printed

    Affiliated with an institute covered by a cooperation agreement with CERN

32. M. Artuso

    Syracuse University

    Affiliation as printed

    Syracuse University, Syracuse, New York, USA

33. E. Aslanides

    Centre National de la Recherche Scientifique · Aix-Marseille Université · Centre de physique des particules de Marseille · Institut National de Physique Nucléaire et de Physique des Particules

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    Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France

34. M. Atzeni

    University of Zurich

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    Physik-Institut, Universität Zürich, Zürich, Switzerland

35. B. Audurier

    Centre National de la Recherche Scientifique · École Polytechnique · Institut National de Physique Nucléaire et de Physique des Particules · Institut Polytechnique de Paris · Laboratoire Leprince-Ringuet

    Affiliation as printed

    Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France

36. S. Bachmann

    Heidelberg University

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    Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany

37. Marie Bachmayer

    École Polytechnique Fédérale de Lausanne

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    Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

38. John J Back

    University of Warwick

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    Department of Physics, University of Warwick, Coventry, United Kingdom

39. A. Bailly-reyre

    Centre National de la Recherche Scientifique · Sorbonne Université · Laboratoire de Physique Nucléaire et de Hautes Énergies · Institut National de Physique Nucléaire et de Physique des Particules

    Affiliation as printed

    LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France

40. P. Baladrón Rodríguez

    Universidade de Santiago de Compostela

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    Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain

41. V. Balagura

    Centre National de la Recherche Scientifique · École Polytechnique · Institut National de Physique Nucléaire et de Physique des Particules · Institut Polytechnique de Paris · Laboratoire Leprince-Ringuet

    Affiliation as printed

    Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France

42. W. Baldini

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

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    INFN Sezione di Ferrara, Ferrara, Italy

43. J. Baptista de Souza Leite

    Centro Brasileiro de Pesquisas Físicas

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    Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil

44. M. Barbetti

    Istituto Nazionale di Fisica Nucleare, Sezione di Firenze

    Affiliation as printed

    INFN Sezione di Firenze, Firenze, Italy

45. Roger John Barlow

    University of Manchester

    Affiliation as printed

    Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom

46. S. Barsuk

    Centre National de la Recherche Scientifique · Université Paris-Saclay · Institut National de Physique Nucléaire et de Physique des Particules · Laboratoire de Physique des 2 Infinis Irène Joliot-Curie

    Affiliation as printed

    Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France

47. W. Barter

    Imperial College London

    Affiliation as printed

    Imperial College London, London, United Kingdom

48. M. Bartolini

    University of Cambridge

    Affiliation as printed

    Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom

49. F. Baryshnikov
    Affiliation as printed

    Affiliated with an institute covered by a cooperation agreement with CERN

50. J. M. Basels Aachen I. Physikalisches Institut

    RWTH Aachen University

    Affiliation as printed

    I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany

51. G. Bassi

    Istituto Nazionale di Fisica Nucleare, Sezione di Pisa

    Affiliation as printed

    INFN Sezione di Pisa, Pisa, Italy

52. B. Batsukh

    Institute of High Energy Physics

    Affiliation as printed

    Institute Of High Energy Physics (IHEP), Beijing, China

53. A. Battig

    TU Dortmund University

    Affiliation as printed

    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

54. A. Bay

    École Polytechnique Fédérale de Lausanne

    Affiliation as printed

    Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

55. A. Beck

    University of Warwick

    Affiliation as printed

    Department of Physics, University of Warwick, Coventry, United Kingdom

56. M. Becker

    TU Dortmund University

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    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

57. F. Bedeschi

    Istituto Nazionale di Fisica Nucleare, Sezione di Pisa

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    INFN Sezione di Pisa, Pisa, Italy

58. I. Bediaga

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil

59. A. Beiter

    Syracuse University

    Affiliation as printed

    Syracuse University, Syracuse, New York, USA

60. V. Belavin
    Affiliation as printed

    Affiliated with an institute covered by a cooperation agreement with CERN

61. S. Belin

    Universidade de Santiago de Compostela

    Affiliation as printed

    Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain

62. V. Bellée

    University of Zurich

    Affiliation as printed

    Physik-Institut, Universität Zürich, Zürich, Switzerland

63. K. Belous
    Affiliation as printed

    Affiliated with an institute covered by a cooperation agreement with CERN

64. I. Belov
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    Affiliated with an institute covered by a cooperation agreement with CERN

65. I. Belyaev
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    Affiliated with an institute covered by a cooperation agreement with CERN

66. G. Bencivenni

    Istituto Nazionale di Fisica Nucleare · Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati

    Affiliation as printed

    INFN Laboratori Nazionali di Frascati, Frascati, Italy

67. E. Ben-Haim

    Centre National de la Recherche Scientifique · Sorbonne Université · Laboratoire de Physique Nucléaire et de Hautes Énergies · Institut National de Physique Nucléaire et de Physique des Particules

    Affiliation as printed

    LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France

68. Alexander Berezhnoy
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    Affiliated with an institute covered by a cooperation agreement with CERN

69. R. Bernet

    University of Zurich

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    Physik-Institut, Universität Zürich, Zürich, Switzerland

70. D. Berninghoff

    Heidelberg University

    Affiliation as printed

    Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany

71. H. C. Bernstein

    Syracuse University

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    Syracuse University, Syracuse, New York, USA

72. C. Bertella

    University of Manchester

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    Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom

73. A. Bertolin

    University of Padua · Istituto Nazionale di Fisica Nucleare, Sezione di Padova

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    Università degli Studi di Padova, Università e INFN, Padova, Padova, Italy

74. C. Betancourt

    University of Zurich

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    Physik-Institut, Universität Zürich, Zürich, Switzerland

75. F. Betti

    European Organization for Nuclear Research

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    European Organization for Nuclear Research (CERN), Geneva, Switzerland

76. Ia. Bezshyiko

    University of Zurich

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    Physik-Institut, Universität Zürich, Zürich, Switzerland

77. S. Bhasin

    University of Bristol

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    H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom

78. J. Bhom

    Institute of Nuclear Physics, Polish Academy of Sciences

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    Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland

79. L. Bian

    Wuhan University · Tsinghua University

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    School of Physics and Technology, Wuhan University, Wuhan, China (associated with Institution Center for High Energy Physics, Tsinghua University, Beijing, China)

80. M. S. Bieker

    TU Dortmund University

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    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

81. N. V. Biesuz

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

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    INFN Sezione di Ferrara, Ferrara, Italy

82. S. Bifani

    University of Birmingham

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    University of Birmingham, Birmingham, United Kingdom

83. P. Billoir

    Centre National de la Recherche Scientifique · Sorbonne Université · Laboratoire de Physique Nucléaire et de Hautes Énergies · Institut National de Physique Nucléaire et de Physique des Particules

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    LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France

84. Alice Biolchini

    National Institute for Subatomic Physics

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    Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands

85. M. Birch

    Imperial College London

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    Imperial College London, London, United Kingdom

86. F. C. R. Bishop

    University of Cambridge

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    Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom

87. A. Bitadze

    University of Manchester

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    Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom

88. A. Bizzeti

    University of Cambridge

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    Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom

89. Michele Piero Blago

    University of Cambridge

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    Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom

90. Thomas Blake

    University of Warwick

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    Department of Physics, University of Warwick, Coventry, United Kingdom

91. F. Blanc

    École Polytechnique Fédérale de Lausanne

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    Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

92. Steven Roy Blusk

    Syracuse University

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    Syracuse University, Syracuse, New York, USA

93. D. Bobulska

    University of Glasgow

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    School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom

94. J. A. Boelhauve

    TU Dortmund University

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    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

95. O. Boente García

    Universidade de Santiago de Compostela

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    Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain

96. T. Boettcher

    University of Cincinnati

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    University of Cincinnati, Cincinnati, Ohio, USA

97. A. S. Boldyrev
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    Affiliated with an institute covered by a cooperation agreement with CERN

98. N. Bondar

    European Organization for Nuclear Research

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    Affiliated with an institute covered by a cooperation agreement with CERN

    European Organization for Nuclear Research (CERN), Geneva, Switzerland

99. S. Borghi

    University of Manchester

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    Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom