Analysis of $$ {\Lambda}_b^0 $$ → pK−μ+μ− decays

Journal of High Energy Physics, vol. 2024

Abstract

A bstract The differential branching fraction and angular coefficients of $$ {\Lambda}_b^0 $$ Λ b 0 → pK − μ + μ − decays are measured in bins of the dimuon mass squared and dihadron mass. The analysis is performed using a data set corresponding to 9 fb − 1 of integrated luminosity collected with the LHCb detector between 2011 and 2018. The data are consistent with receiving contributions from a mixture of Λ resonances with different spin-parity quantum numbers. The angular coefficients show a pattern of vector-axial vector interference that is a characteristic of the type of flavour-changing neutral-current transition relevant for these decays.

Authors 98

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. F. Abudinén

   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

   Affiliation as printed

   Uppsala University

10. C. Agapopoulou

    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

11. C. Aidala

    University of Michigan

    Affiliation as printed

    University of Michigan

12. Z. Ajaltouni

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

    Affiliation as printed

    Université Clermont Auvergne, CNRS/IN2P3, LPC

13. S. Akar

    University of Cincinnati

    Affiliation as printed

    University of Cincinnati

14. K. Carvalho Akiba

    National Institute for Subatomic Physics

    Affiliation as printed

    Nikhef National Institute for Subatomic Physics

15. P. Albicocco

    Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati

    Affiliation as printed

    INFN Laboratori Nazionali di Frascati

16. J. Albrecht

    TU Dortmund University · Lamarr Institute for Machine Learning and Artificial Intelligence

    Affiliation as printed

    Lamarr Institute for Machine Learning and Artificial Intelligence

    Technische Universität Dortmund

17. F. Alessio

    European Organization for Nuclear Research

    Affiliation as printed

    European Organization for Nuclear Research (CERN)

18. Michael Thomas Alexander

    University of Glasgow

    Affiliation as printed

    University of Glasgow

19. Zakariya Aliouche

    University of Manchester

    Affiliation as printed

    University of Manchester

20. P. Álvarez Cartelle

    University of Cambridge

    Affiliation as printed

    University of Cambridge

21. R. Amalric

    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

22. S. Amato

    Universidade Federal do Rio de Janeiro

    Affiliation as printed

    Universidade Federal do Rio de Janeiro (UFRJ)

23. J. L. Amey

    University of Bristol

    Affiliation as printed

    University of Bristol

24. 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)

    Université Paris-Saclay, CNRS/IN2P3, IJCLab

25. Liupan An

    Peking University

    Affiliation as printed

    Peking University

26. L. Anderlini

    Istituto Nazionale di Fisica Nucleare, Sezione di Firenze

    Affiliation as printed

    INFN Sezione di Firenze

27. Martin Andersson

    University of Zurich

    Affiliation as printed

    Universität Zürich

28. A. Andreianov
29. P. Andreola

    University of Zurich

    Affiliation as printed

    Universität Zürich

30. M. Andreotti

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

    Affiliation as printed

    INFN Sezione di Ferrara

31. D. Andreou

    Syracuse University

    Affiliation as printed

    Syracuse University

32. Alessia Anelli

    Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca · University of Milano-Bicocca

    Affiliation as printed

    INFN Sezione di Milano-Bicocca

    Università degli Studi di Milano-Bicocca

33. D. Ao

    University of Chinese Academy of Sciences

    Affiliation as printed

    University of Chinese Academy of Sciences

34. F. Archilli

    University of Rome Tor Vergata · Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata

    Affiliation as printed

    INFN Sezione di Roma Tor Vergata

    Università di Roma Tor Vergata

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. A. Artamonov
38. M. Artuso

    Syracuse University

    Affiliation as printed

    Syracuse University

39. 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

    Affiliation as printed

    Aix Marseille Univ, CNRS/IN2P3, CPPM

40. R. Ataíde Da Silva

    École Polytechnique Fédérale de Lausanne

    Affiliation as printed

    Ecole Polytechnique Fédérale de Lausanne (EPFL)

41. M. Atzeni

    Massachusetts Institute of Technology

    Affiliation as printed

    Massachusetts Institute of Technology

42. 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

43. D. Bacher

    University of Oxford

    Affiliation as printed

    University of Oxford

44. I. Bachiller

    Centre National de la Recherche Scientifique · Laboratoire d’Annecy de Physique des Particules · Institut National de Physique Nucléaire et de Physique des Particules · Université Savoie Mont Blanc

    Affiliation as printed

    Université Savoie Mont Blanc, CNRS, IN2P3-LAPP

45. S. Bachmann

    Heidelberg University

    Affiliation as printed

    Ruprecht-Karls-Universität Heidelberg

46. M. Bachmayer

    École Polytechnique Fédérale de Lausanne

    Affiliation as printed

    Ecole Polytechnique Fédérale de Lausanne (EPFL)

47. J. J. Back

    University of Warwick

    Affiliation as printed

    University of Warwick

48. P. Baladrón Rodríguez

    Universidade de Santiago de Compostela

    Affiliation as printed

    Universidade de Santiago de Compostela

49. 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

50. W. Baldini

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

    Affiliation as printed

    INFN Sezione di Ferrara

51. Luca Balzani

    TU Dortmund University

    Affiliation as printed

    Technische Universität Dortmund

52. H. Bao

    University of Chinese Academy of Sciences

    Affiliation as printed

    University of Chinese Academy of Sciences

53. J. Baptista de Souza Leite

    University of Liverpool

    Affiliation as printed

    University of Liverpool

54. M. Barbetti

    Istituto Nazionale di Fisica Nucleare, Sezione di Firenze

    Affiliation as printed

    INFN Sezione di Firenze

55. I. R. Barbosa

    Pontifícia Universidade Católica do Rio de Janeiro

    Affiliation as printed

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

56. Roger John Barlow

    University of Manchester

    Affiliation as printed

    University of Manchester

57. Mikhail Barnyakov

    Istituto Nazionale di Fisica Nucleare, Sezione di Bologna

    Affiliation as printed

    INFN Sezione di Bologna

58. 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

59. W Barter

    University of Edinburgh

    Affiliation as printed

    University of Edinburgh

60. M. Bartolini

    University of Cambridge

    Affiliation as printed

    University of Cambridge

61. Justin Bartz

    Syracuse University

    Affiliation as printed

    Syracuse University

62. J. M. Basels Aachen

    RWTH Aachen University

    Affiliation as printed

    RWTH Aachen University

63. S. Bashir

    AGH University of Krakow

    Affiliation as printed

    AGH - University of Krakow, Faculty of Physics and Applied Computer Science

64. G. Bassi

    Scuola Normale Superiore · Istituto Nazionale di Fisica Nucleare, Sezione di Pisa

    Affiliation as printed

    INFN Sezione di Pisa

    Scuola Normale Superiore

65. B. Batsukh

    Institute for High Energy Physics · Institute of High Energy Physics

    Affiliation as printed

    Institute Of High Energy Physics (IHEP)

66. Piera Battista

    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

67. A. Bay

    École Polytechnique Fédérale de Lausanne

    Affiliation as printed

    Ecole Polytechnique Fédérale de Lausanne (EPFL)

68. A. Beck

    University of Warwick

    Affiliation as printed

    University of Warwick

69. F. Bedeschi

    Istituto Nazionale di Fisica Nucleare, Sezione di Pisa

    Affiliation as printed

    INFN Sezione di Pisa

70. I. B. Bediaga

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Físicas (CBPF)

71. Noah Albin Behling

    TU Dortmund University

    Affiliation as printed

    Technische Universität Dortmund

72. S. Belin

    Universidade de Santiago de Compostela

    Affiliation as printed

    Universidade de Santiago de Compostela

73. V. Bellée

    University of Zurich

    Affiliation as printed

    Universität Zürich

74. K. Belous
75. I. Belov

    Istituto Nazionale di Fisica Nucleare, Sezione di Genova

    Affiliation as printed

    INFN Sezione di Genova

76. I. Belyaev

    Istituto Nazionale di Fisica Nucleare, Sezione di Roma I

    Affiliation as printed

    INFN Sezione di Roma La Sapienza

77. G. Benane

    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

    Affiliation as printed

    Aix Marseille Univ, CNRS/IN2P3, CPPM

78. G. Bencivenni

    Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati

    Affiliation as printed

    INFN Laboratori Nazionali di Frascati

79. 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

80. Alexander Berezhnoy
81. R. Bernet

    University of Zurich

    Affiliation as printed

    Universität Zürich

82. Sergi Bernet Andrés

    Universitat Ramon Llull

    Affiliation as printed

    Universitat Ramon Llull

83. A. Bertolin

    Istituto Nazionale di Fisica Nucleare, Sezione di Padova

    Affiliation as printed

    INFN Sezione di Padova

84. C. Betancourt

    University of Zurich

    Affiliation as printed

    Universität Zürich

85. F. Betti

    University of Edinburgh

    Affiliation as printed

    University of Edinburgh

86. J. Bex

    University of Cambridge

    Affiliation as printed

    University of Cambridge

87. Ia. Bezshyiko

    University of Zurich

    Affiliation as printed

    Universität Zürich

88. J. Bhom

    Institute of Nuclear Physics, Polish Academy of Sciences

    Affiliation as printed

    Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences

89. M. S. Bieker

    TU Dortmund University

    Affiliation as printed

    Technische Universität Dortmund

90. N. V. Biesuz

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

    Affiliation as printed

    INFN Sezione di Ferrara

91. 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

    Affiliation as printed

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

92. Alice Biolchini

    National Institute for Subatomic Physics

    Affiliation as printed

    Nikhef National Institute for Subatomic Physics

93. M. Birch

    Imperial College London

    Affiliation as printed

    Imperial College London

94. F. C. R. Bishop

    Centre National de la Recherche Scientifique · Laboratoire d’Annecy de Physique des Particules · Institut National de Physique Nucléaire et de Physique des Particules · Université Savoie Mont Blanc

    Affiliation as printed

    Université Savoie Mont Blanc, CNRS, IN2P3-LAPP

95. A. Bitadze

    University of Manchester

    Affiliation as printed

    University of Manchester

96. A. Bizzeti
97. Thomas Blake

    University of Warwick

    Affiliation as printed

    University of Warwick

98. F. Blanc

    École Polytechnique Fédérale de Lausanne

    Affiliation as printed

    Ecole Polytechnique Fédérale de Lausanne (EPFL)