Probing the flavour structure of dimension-6 EFT operators in multilepton final states in proton-proton collisions at $$ \sqrt{s}=13 $$ TeV

Journal of High Energy Physics, vol. 2026

Abstract

A bstract An analysis of the flavour structure of dimension-6 effective field theory (EFT) operators in multilepton final states is presented, focusing on the interactions of quarks with Z bosons. For the first time, the flavour structure of these operators is disentangled by simultaneously probing the interactions with different quark generations. The analysis targets the associated production of a top quark pair and a Z boson, as well as diboson processes in final states with at least three leptons, which can be electrons or muons. The data were recorded by the CMS experiment in the years 2016–2018 in proton-proton collisions at a centre-of-mass energy of 13 TeV and correspond to an integrated luminosity of 138 fb − 1 . Consistency with the standard model of particle physics is observed and limits are set on the selected Wilson coefficients, split into couplings to light- and heavy-quark generations.

Authors 98

1. Aram Hayrapetyan

   A. Alikhanyan National Laboratory

   Affiliation as printed

   Yerevan Physics Institute

2. В. Макаренко

   A. Alikhanyan National Laboratory

   Affiliation as printed

   Yerevan Physics Institute

3. A. Tumasyan

   A. Alikhanyan National Laboratory · Yerevan State University

   Affiliation as printed

   Yerevan Physics Institute

   Yerevan State University

4. Wolfgang Adam

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik

5. Janik Walter Andrejkovic

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik

6. L. Benato

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik

7. T. Bergauer

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik

8. M. Dragicevic

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik

9. Priya Sajid Hussain

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik

10. M. Jeitler

    TU Wien · Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

    TU Wien

11. Natascha Krammer

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

12. A. Li

    University of California, Santa Barbara · Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

    University of California, Santa Barbara — Department of Physics

13. Dietrich Liko

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

14. Mark Matthewman

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

15. I. Mikulec

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

16. J. Schieck

    TU Wien · Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

    TU Wien

17. Dennis Schwarz

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

18. R. Schöfbeck

    TU Wien · Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

    TU Wien

19. Maryam Shooshtari

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

20. M. Sonawane

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

21. W. Waltenberger

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

22. C.-E. Wulz

    TU Wien · Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

    TU Wien

23. X. Janssen

    University of Antwerp

    Affiliation as printed

    Universiteit Antwerpen

24. H. Kwon

    University of Antwerp

    Affiliation as printed

    Universiteit Antwerpen

25. Daniel Ocampo Henao

    University of Antwerp

    Affiliation as printed

    Universiteit Antwerpen

26. T. Van Laer

    University of Antwerp

    Affiliation as printed

    Universiteit Antwerpen

27. P. Van Mechelen

    University of Antwerp

    Affiliation as printed

    Universiteit Antwerpen

28. Jas Bierkens

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

29. Nordin Breugelmans

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

30. J. D’Hondt

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

31. Soumya Dansana

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

32. A. De Moor

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

33. M. Delcourt

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

34. Felix Heyen

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

35. Yanwen Hong

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

36. Pavlo Kashko

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

37. S. Lowette

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

38. Inna Makarenko

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

39. Denise Müller

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

40. Juhee Song

    Vrije Universiteit Brussel · Institute of High Energy Physics · University of Chinese Academy of Sciences

    Affiliation as printed

    Institute of High Energy Physics

    University of Chinese Academy of Sciences

    Vrije Universiteit Brussel

41. S. Tavernier

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

42. M. Tytgat

    Vrije Universiteit Brussel · Ghent University

    Affiliation as printed

    Ghent University

    Vrije Universiteit Brussel

43. G. P. Van Onsem

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

44. Senne Van Putte

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

45. David Vannerom

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

46. B. Bilin

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

47. B. Clerbaux

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

48. Aloke Kumar Das

    University of Notre Dame · Université Libre de Bruxelles

    Affiliation as printed

    University of Notre Dame

    Université Libre de Bruxelles

49. Isabelle De Bruyn

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

50. G. De Lentdecker

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

51. Hugues Evard

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

52. L. Favart

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

53. P. Gianneios

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

54. Fakhri Alam Khan

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

55. Andrea Malara

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

56. Muhammad Aamir Shahzad

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

57. Laurent Thomas

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

58. M. Vanden Bemden

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

59. Catherine Vander Velde

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

60. Pascal Vanlaer

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

61. Fengwangdong Zhang

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

62. M. De Coen

    Ghent University

    Affiliation as printed

    Ghent University

63. D. Dobur

    Ghent University

    Affiliation as printed

    Ghent University

64. G. Gökbulut

    Ghent University

    Affiliation as printed

    Ghent University

65. J. Knolle

    Ghent University

    Affiliation as printed

    Ghent University

66. Luka Lambrecht

    Ghent University

    Affiliation as printed

    Ghent University

67. David Marckx

    Ghent University

    Affiliation as printed

    Ghent University

68. K. Skovpen

    Ghent University

    Affiliation as printed

    Ghent University

69. N. Van Den Bossche

    Ghent University

    Affiliation as printed

    Ghent University

70. Jan van der Linden

    Ghent University

    Affiliation as printed

    Ghent University

71. Jean‐Marc Vanden‐Broeck

    Ghent University

    Affiliation as printed

    Ghent University

72. Liam Wezenbeek

    Ghent University

    Affiliation as printed

    Ghent University

73. S. Bein

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

74. A. Benecke

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

75. Agni Bethani

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

76. G. Bruno

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

77. Alessandra Cappati

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

78. J. De Favereau De Jeneret

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

79. Christophe Delaere

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

80. ANDREA GIAMMANCO

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

81. Ahmet Oguz Guzel

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

82. Vincent Lemaître

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

83. Jindrich Lidrych

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

84. Paul Malek

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

85. Paola Mastrapasqua

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

86. S. Turkcapar

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

87. Gilvan Augusto Alves

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

88. M. Barroso Ferreira Filho

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

89. E. Coelho

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

90. C. Hensel

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

91. T. Menezes De Oliveira

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

92. Clemencia Mora Herrera

    Universidade do Estado do Rio de Janeiro · Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

    Universidade do Estado do Rio de Janeiro

93. P. Rebello Teles

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

94. Mariana Soeiro

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

95. E. J. Tonelli Manganote

    Centro Brasileiro de Pesquisas Físicas · Centro Universitário FACAMP

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

    FACAMP — Faculdades de Campinas

96. A. Vilela Pereira

    Universidade do Estado do Rio de Janeiro · Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

    Universidade do Estado do Rio de Janeiro

97. W. L. Aldá Júnior

    Universidade do Estado do Rio de Janeiro

    Affiliation as printed

    Universidade do Estado do Rio de Janeiro

98. H. Brandao Malbouisson

    Universidade do Estado do Rio de Janeiro

    Affiliation as printed

    Universidade do Estado do Rio de Janeiro