Search for long-lived particles using displaced vertices and missing transverse momentum in proton-proton collisions at s=13 TeV

Physical review. D/Physical review. D., vol. 109

Abstract

A search for the production of long-lived particles in proton-proton collisions at a center-of-mass energy of 13 TeV at the CERN LHC is presented. The search is based on data collected by the CMS experiment in 2016–2018, corresponding to a total integrated luminosity of 137 fb−1 . This search is designed to be sensitive to long-lived particles with mean proper decay lengths between 0.1 and 1000 mm, whose decay products produce a final state with at least one displaced vertex and missing transverse momentum. A machine learning algorithm, which improves the background rejection power by more than an order of magnitude, is applied to improve the sensitivity. The observation is consistent with the standard model background prediction, and the results are used to constrain split supersymmetry (SUSY) and gauge-mediated SUSY breaking models with different gluino mean proper decay lengths and masses. This search is the first CMS search that shows sensitivity to hadronically decaying long-lived particles from signals with mass differences between the gluino and neutralino below 100 GeV. It sets the most stringent limits to date for split-SUSY models and gauge-mediated SUSY breaking models with gluino proper decay length less than 6 mm. © 2024 CERN, for the CMS Collaboration 2024 CERN

Authors 98

1. Aram Hayrapetyan

   A. Alikhanyan National Laboratory

   Affiliation as printed

   Yerevan Physics Institute

   The CMS collaboration. et al

   Yerevan Physics Inst. (YerPhI) (Armenia)

2. A. Tumasyan

   A. Alikhanyan National Laboratory

   Affiliation as printed

   Yerevan Physics Institute

3. W. Adam

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik

4. Janik Walter Andrejkovic

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik

5. T. Bergauer

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik

6. S. Chatterjee

   Institute of High Energy Physics

   Affiliation as printed

   Indian Institute of Technology

   Institut für Hochenergiephysik

7. K. Damanakis

   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

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

11. Natascha Krammer

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

12. A. Li

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

    University of California

13. Dietrich Liko

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

14. I. Mikulec

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

15. J. Schieck

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

16. R. Schöfbeck

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

17. Dennis Schwarz

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

18. M. Sonawane

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

19. S. Templ

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

20. W. Waltenberger

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

21. C.-E. Wulz

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

22. M. R. Darwish

    University of Antwerp

    Affiliation as printed

    Universiteit Antwerpen

23. X. Janssen

    University of Antwerp

    Affiliation as printed

    Universiteit Antwerpen

24. P. Van Mechelen

    University of Antwerp

    Affiliation as printed

    Universiteit Antwerpen

25. E. S. Bols

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

26. J. D’Hondt

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

27. Soumya Dansana

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

28. A. De Moor

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

29. M. Delcourt

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

30. S. Lowette

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

31. Inna Makarenko

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

32. D. Müller

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

33. S. Tavernier

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

34. M. Tytgat

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

35. G. P. Van Onsem

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

36. Senne Van Putte

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

37. David Vannerom

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

38. B. Clerbaux

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

39. G. De Lentdecker

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

40. Hugues Evard

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

41. L. Favart

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

42. P. Gianneios

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

43. D. Hohov

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

44. J. Jaramillo

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

45. A. Khalilzadeh

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

46. Fakhri Alam Khan

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

47. K. Lee

    Université Libre de Bruxelles · Korea University

    Affiliation as printed

    Korea University

    Université Libre de Bruxelles

48. M. Mahdavikhorrami

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

49. Andrea Malara

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

50. S. R. Paredes Saenz

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

51. L. Thomas

    Université Libre de Bruxelles

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    Université Libre de Bruxelles

52. M. Vanden Bemden

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

53. C. Vander Velde

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

54. Pascal Vanlaer

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

55. M. De Coen

    Ghent University

    Affiliation as printed

    Ghent University

56. D. Dobur

    Ghent University

    Affiliation as printed

    Ghent University

57. Y. Hong

    Ghent University

    Affiliation as printed

    Ghent University

58. J. Knolle

    Ghent University

    Affiliation as printed

    Ghent University

59. Luka Lambrecht

    Ghent University

    Affiliation as printed

    Ghent University

60. Gianny Mestdach

    Ghent University

    Affiliation as printed

    Ghent University

61. K. Mota Amarilo

    Ghent University

    Affiliation as printed

    Ghent University

62. César Rendón

    Ghent University

    Affiliation as printed

    Ghent University

63. Amrutha Samalan

    Ghent University

    Affiliation as printed

    Ghent University

64. K. Skovpen

    Ghent University

    Affiliation as printed

    Ghent University

65. N. Van Den Bossche

    Ghent University

    Affiliation as printed

    Ghent University

66. J. Van Der Linden

    Ghent University

    Affiliation as printed

    Ghent University

67. Liam Wezenbeek

    Ghent University

    Affiliation as printed

    Ghent University

68. A. Benecke

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

69. Agni Bethani

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

70. G. Bruno

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

71. C. Caputo

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

72. Christophe Delaere

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

73. I. S. Donertas

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

74. ANDREA GIAMMANCO

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

75. Sandhya Jain

    Tata Institute of Fundamental Research · UCLouvain

    Affiliation as printed

    Tata Institute of Fundamental Research

    Université Catholique de Louvain

76. V. Lemaı̂tre

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

77. J. Lidrych

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

78. Paola Mastrapasqua

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

79. T. T. Tran

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

80. S. Wertz

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

81. Gilvan Augusto Alves

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

82. E. Coelho

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

83. C. Hensel

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

84. T. Menezes De Oliveira

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

85. Arthur M. Moraes

    Centro Brasileiro de Pesquisas Físicas

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    Centro Brasileiro de Pesquisas Fisicas

86. P. Rebello Teles

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

87. W. L. Aldá Júnior

    Universidade do Estado do Rio de Janeiro

    Affiliation as printed

    Universidade do Estado do Rio de Janeiro

88. M. Alves Gallo Pereira

    Universidade do Estado do Rio de Janeiro

    Affiliation as printed

    Universidade do Estado do Rio de Janeiro

89. M. Barroso Ferreira Filho

    Universidade do Estado do Rio de Janeiro

    Affiliation as printed

    Universidade do Estado do Rio de Janeiro

90. H. Malbouisson

    Universidade do Estado do Rio de Janeiro

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    Universidade do Estado do Rio de Janeiro

91. W. Carvalho

    Universidade do Estado do Rio de Janeiro

    Affiliation as printed

    Universidade do Estado do Rio de Janeiro

92. J. Chinellato

    Universidade do Estado do Rio de Janeiro

    Affiliation as printed

    Universidade do Estado do Rio de Janeiro

93. E. M. Da Costa

    Universidade do Estado do Rio de Janeiro

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    Universidade do Estado do Rio de Janeiro

94. G. G. Da Silveira

    Universidade do Estado do Rio de Janeiro

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    Universidade do Estado do Rio de Janeiro

95. D. De Jesus Damião

    Universidade do Estado do Rio de Janeiro

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    Universidade do Estado do Rio de Janeiro

96. S. Fonseca De Souza

    Universidade do Estado do Rio de Janeiro

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    Universidade do Estado do Rio de Janeiro

97. Raphael Gomes de Souza

    Universidade do Estado do Rio de Janeiro

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    Universidade do Estado do Rio de Janeiro

98. J. Martins

    Universidade do Estado do Rio de Janeiro

    Affiliation as printed

    Universidade do Estado do Rio de Janeiro