Electron and photon reconstruction and identification with the CMS experiment at the CERN LHC

Journal of Instrumentation, vol. 16, pp. P05014

Abstract

Abstract The performance is presented of the reconstruction and identification algorithms for electrons and photons with the CMS experiment at the LHC. The reported results are based on proton-proton collision data collected at a center-of-mass energy of 13 TeV and recorded in 2016–2018, corresponding to an integrated luminosity of 136 fb^-1. Results obtained from lead-lead collision data collected at √(sNN)=5.02 TeV are also presented. Innovative techniques are used to reconstruct the electron and photon signals in the detector and to optimize the energy resolution. Events with electrons and photons in the final state are used to measure the energy resolution and energy scale uncertainty in the recorded events. The measured energy resolution for electrons produced in Z boson decays in proton-proton collision data ranges from 2 to 5%, depending on electron pseudorapidity and energy loss through bremsstrahlung in the detector material. The energy scale in the same range of energies is measured with an uncertainty smaller than 0.1 (0.3)% in the barrel (endcap) region in proton-proton collisions and better than 1 (3)% in the barrel (endcap) region in heavy ion collisions. The timing resolution for electrons from Z boson decays with the full 2016–2018 proton-proton collision data set is measured to be 200 ps.

Authors 99

1. A. M. Sirunyan

   A. Alikhanyan National Laboratory

   Affiliation as printed

   The CMS collaboration Yerevan Physics Institute , Yerevan , Armenia

   Yerevan Physics Institute, Yerevan, Armenia

2. W. Adam

   A. Alikhanyan National Laboratory · Institute of High Energy Physics

   Affiliation as printed

   The CMS collaboration Yerevan Physics Institute , Yerevan , Armenia

   Institut für Hochenergiephysik, Wien, Austria

3. T. Bergauer

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik , Wien , Austria

   Institut für Hochenergiephysik, Wien, Austria

4. M. Dragicevic

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik , Wien , Austria

   Institut für Hochenergiephysik, Wien, Austria

5. A. Escalante Del Valle

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik, Wien, Austria

6. Rudolf Konrad Fruhwirth

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik , Wien , Austria

   Institut für Hochenergiephysik, Wien, Austria

7. M. Jeitler

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik , Wien , Austria

   Institut für Hochenergiephysik, Wien, Austria

8. Natascha Krammer

   A. Alikhanyan National Laboratory · Institute of High Energy Physics

   Affiliation as printed

   The CMS collaboration Yerevan Physics Institute , Yerevan , Armenia

   Institut für Hochenergiephysik, Wien, Austria

9. L. Lechner

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik , Wien , Austria

   Institut für Hochenergiephysik, Wien, Austria

10. D. Liko

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik , Wien , Austria

    Institut für Hochenergiephysik, Wien, Austria

11. I. Mikulec

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik , Wien , Austria

    Institut für Hochenergiephysik, Wien, Austria

12. F. M. Pitters

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik , Wien , Austria

    Institut für Hochenergiephysik, Wien, Austria

13. Navid K. Rad

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik , Wien , Austria

    Institut für Hochenergiephysik, Wien, Austria

14. J. Schieck

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik , Wien , Austria

    Institut für Hochenergiephysik, Wien, Austria

15. R. Schöfbeck

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik , Wien , Austria

    Institut für Hochenergiephysik, Wien, Austria

16. M. Spanring

    Institute of High Energy Physics

    Affiliation as printed

    Institute for Nuclear Problems , Minsk , Belarus

    Institut für Hochenergiephysik, Wien, Austria

17. S. Templ

    Institute of High Energy Physics

    Affiliation as printed

    Institute for Nuclear Problems , Minsk , Belarus

    Institut für Hochenergiephysik, Wien, Austria

18. W. Waltenberger

    Institute of High Energy Physics

    Affiliation as printed

    Institute for Nuclear Problems , Minsk , Belarus

    Institut für Hochenergiephysik, Wien, Austria

19. C.-E. Wulz

    Institute of High Energy Physics

    Affiliation as printed

    Institute for Nuclear Problems , Minsk , Belarus

    Institut für Hochenergiephysik, Wien, Austria

20. M. Zarucki

    Institute of High Energy Physics

    Affiliation as printed

    Institute for Nuclear Problems , Minsk , Belarus

    Institut für Hochenergiephysik, Wien, Austria

21. V. Chekhovsky

    University of Antwerp

    Affiliation as printed

    Universiteit Antwerpen , Antwerpen , Belgium

    Institute for Nuclear Problems, Minsk, Belarus

22. A. Litomin
    Affiliation as printed

    Institute for Nuclear Problems , Minsk , Belarus

    Institute for Nuclear Problems, Minsk, Belarus

23. В. Макаренко
    Affiliation as printed

    Institute for Nuclear Problems , Minsk , Belarus

    Institute for Nuclear Problems, Minsk, Belarus

24. J. Suarez Gonzalez
    Affiliation as printed

    Institute for Nuclear Problems , Minsk , Belarus

    Institute for Nuclear Problems, Minsk, Belarus

25. M. R. Darwish

    University of Antwerp

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    Universiteit Antwerpen , Antwerpen , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

26. E.A. De Wolf

    University of Antwerp

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    Universiteit Antwerpen , Antwerpen , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

27. X. Janssen

    University of Antwerp

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    Universiteit Antwerpen , Antwerpen , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

28. T. Kello

    University of Antwerp · Zhejiang University

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    Zhejiang University , Hangzhou , China

    Universiteit Antwerpen, Antwerpen, Belgium

29. A. Lelek

    University of Antwerp

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    Universiteit Antwerpen , Antwerpen , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

30. M. Pieters

    University of Antwerp

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    Universiteit Antwerpen , Antwerpen , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

31. H. Rejeb Sfar

    University of Antwerp

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    Universiteit Antwerpen , Antwerpen , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

32. H. Van Haevermaet

    Vrije Universiteit Brussel · University of Antwerp

    Affiliation as printed

    Vrije Universiteit Brussel , Brussel , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

33. P. Van Mechelen

    Vrije Universiteit Brussel · University of Antwerp

    Affiliation as printed

    Vrije Universiteit Brussel , Brussel , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

34. Senne Van Putte

    University of Antwerp

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    Universiteit Antwerpen , Antwerpen , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

35. N. Van Remortel

    University of Antwerp

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    Universiteit Antwerpen , Antwerpen , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

36. F. Blekman

    Vrije Universiteit Brussel

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    Vrije Universiteit Brussel , Brussel , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

37. E. S. Bols

    Vrije Universiteit Brussel

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    Vrije Universiteit Brussel , Brussel , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

38. S. S. Chhibra

    Vrije Universiteit Brussel

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    Vrije Universiteit Brussel , Brussel , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

39. J. D’Hondt

    Vrije Universiteit Brussel

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    Vrije Universiteit Brussel , Brussel , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

40. J. De Clercq

    Université Libre de Bruxelles · Vrije Universiteit Brussel

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    Université Libre de Bruxelles , Bruxelles , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

41. D. Lontkovskyi

    Université Libre de Bruxelles · Vrije Universiteit Brussel

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    Université Libre de Bruxelles , Bruxelles , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

42. S. Lowette

    Université Libre de Bruxelles · Vrije Universiteit Brussel

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    Université Libre de Bruxelles , Bruxelles , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

43. I. Marchesini

    Vrije Universiteit Brussel

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    Vrije Universiteit Brussel , Brussel , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

44. S. Moortgat

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel , Brussel , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

45. A. Morton

    Université Libre de Bruxelles · Vrije Universiteit Brussel

    Affiliation as printed

    Université Libre de Bruxelles , Bruxelles , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

46. D. Müller

    Université Libre de Bruxelles · Vrije Universiteit Brussel

    Affiliation as printed

    Université Libre de Bruxelles , Bruxelles , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

47. Q. Python

    Université Libre de Bruxelles · Vrije Universiteit Brussel

    Affiliation as printed

    Université Libre de Bruxelles , Bruxelles , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

48. S. Tavernier

    Université Libre de Bruxelles · Vrije Universiteit Brussel

    Affiliation as printed

    Université Libre de Bruxelles , Bruxelles , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

49. W. Van Doninck

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel, Brussel, Belgium

50. P. Van Mulders

    Vrije Universiteit Brussel

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    Vrije Universiteit Brussel, Brussel, Belgium

51. D. Beghin

    Université Libre de Bruxelles · Ghent University

    Affiliation as printed

    Ghent University , Ghent , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

52. B. Bilin

    Université Libre de Bruxelles · Ghent University

    Affiliation as printed

    Ghent University , Ghent , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

53. B. Clerbaux

    Université Libre de Bruxelles

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    Université Libre de Bruxelles , Bruxelles , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

54. G. De Lentdecker

    Université Libre de Bruxelles

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    Université Libre de Bruxelles , Bruxelles , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

55. B. Dorney

    Université Libre de Bruxelles

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    Université Libre de Bruxelles , Bruxelles , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

56. L. Favart

    Université Libre de Bruxelles · UCLouvain

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    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

57. A. Grebenyuk

    Université Libre de Bruxelles · UCLouvain

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    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

58. A. K. Kalsi

    Université Libre de Bruxelles · UCLouvain

    Affiliation as printed

    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

59. Inna Makarenko

    Université Libre de Bruxelles · Ghent University

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    Ghent University , Ghent , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

60. L. Moureaux

    Université Libre de Bruxelles · Ghent University

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    Ghent University , Ghent , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

61. L. Pétré

    Université Libre de Bruxelles

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    Université Libre de Bruxelles , Bruxelles , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

62. A. Popov

    Université Libre de Bruxelles

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    Université Libre de Bruxelles , Bruxelles , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

63. N. Postiau

    Université Libre de Bruxelles · UCLouvain

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    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

64. Elizabeth Rose Starling

    Université Libre de Bruxelles · UCLouvain

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    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

65. L. Thomas

    Université Libre de Bruxelles · UCLouvain

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    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

66. C. Vander Velde

    Université Libre de Bruxelles

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    Université Libre de Bruxelles, Bruxelles, Belgium

67. Pascal Vanlaer

    Université Libre de Bruxelles · Ghent University

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    Ghent University , Ghent , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

68. David Vannerom

    Université Libre de Bruxelles · Ghent University

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    Ghent University , Ghent , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

69. L. Wezenbeek

    Université Libre de Bruxelles

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    Université Libre de Bruxelles , Bruxelles , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

70. T. Cornelis

    Ghent University

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    Ghent University , Ghent , Belgium

    Ghent University, Ghent, Belgium

71. D. Dobur

    Ghent University

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    Ghent University , Ghent , Belgium

    Ghent University, Ghent, Belgium

72. M. Gruchala

    Ghent University

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    Ghent University , Ghent , Belgium

    Ghent University, Ghent, Belgium

73. I. Khvastunov

    Ghent University · UCLouvain

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    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

    Ghent University, Ghent, Belgium

74. G. Mestdach

    Ghent University · UCLouvain

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    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

    Ghent University, Ghent, Belgium

75. M. Niedziela

    Ghent University · UCLouvain

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    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

    Ghent University, Ghent, Belgium

76. C. Roskas

    Ghent University · UCLouvain

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    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

    Ghent University, Ghent, Belgium

77. K. Skovpen

    Ghent University

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    Ghent University , Ghent , Belgium

    Ghent University, Ghent, Belgium

78. M. Tytgat

    Ghent University

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    Ghent University , Ghent , Belgium

    Ghent University, Ghent, Belgium

79. W. Verbeke

    Ghent University

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    Ghent University , Ghent , Belgium

    Ghent University, Ghent, Belgium

80. B. Vermassen

    Ghent University · UCLouvain

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    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

    Ghent University, Ghent, Belgium

81. M. Vit

    Ghent University · UCLouvain

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    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

    Ghent University, Ghent, Belgium

82. G. Bruno

    Ghent University · UCLouvain

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    Ghent University , Ghent , Belgium

    Université Catholique de Louvain, Louvain-la-Neuve, Belgium

83. F. Bury

    Ghent University · UCLouvain

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    Ghent University , Ghent , Belgium

    Université Catholique de Louvain, Louvain-la-Neuve, Belgium

84. C. Caputo

    UCLouvain

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    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

    Université Catholique de Louvain, Louvain-la-Neuve, Belgium

85. P. David

    UCLouvain

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    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

    Université Catholique de Louvain, Louvain-la-Neuve, Belgium

86. Christophe Delaere

    UCLouvain

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    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

    Université Catholique de Louvain, Louvain-la-Neuve, Belgium

87. M. Delcourt

    UCLouvain

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88. I. S. Donertas

    UCLouvain

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89. ANDREA GIAMMANCO

    Universidade Federal do ABC · UCLouvain

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    Universidade Federal do ABC 𝒃 , São Paulo , Brazil

    Université Catholique de Louvain, Louvain-la-Neuve, Belgium

90. V. Lemaı̂tre

    Ghent University · UCLouvain

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    Ghent University , Ghent , Belgium

    Université Catholique de Louvain, Louvain-la-Neuve, Belgium

91. Kumar Ashok Mondal

    Ghent University · UCLouvain

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    Ghent University , Ghent , Belgium

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92. J. Prisciandaro

    Centro Brasileiro de Pesquisas Físicas · UCLouvain

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    Centro Brasileiro de Pesquisas Fisicas , Rio de Janeiro , Brazil

    Université Catholique de Louvain, Louvain-la-Neuve, Belgium

93. Angela Taliercio

    UCLouvain

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    Université Catholique de Louvain , Louvain-la-Neuve , Belgium

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94. M. Teklishyn

    UCLouvain

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95. P. Vischia

    Universidade Federal do ABC · UCLouvain

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    Universidade Federal do ABC 𝒃 , São Paulo , Brazil

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96. S. Wertz

    Universidade Federal do ABC · UCLouvain

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    Universidade Federal do ABC 𝒃 , São Paulo , Brazil

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    Ghent University · UCLouvain

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98. Gilvan Augusto Alves

    Centro Brasileiro de Pesquisas Físicas

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    Centro Brasileiro de Pesquisas Fisicas , Rio de Janeiro , Brazil

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99. C. Hensel

    Centro Brasileiro de Pesquisas Físicas

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