A new calibration method for charm jet identification validated with proton-proton collision events at √s = 13 TeV

Journal of Instrumentation, vol. 17, pp. P03014

Abstract

Abstract Many measurements at the LHC require efficient identification of heavy-flavour jets, i.e. jets originating from bottom (b) or charm (c) quarks. An overview of the algorithms used to identify c jets is described and a novel method to calibrate them is presented. This new method adjusts the entire distributions of the outputs obtained when the algorithms are applied to jets of different flavours. It is based on an iterative approach exploiting three distinct control regions that are enriched with either b jets, c jets, or light-flavour and gluon jets. Results are presented in the form of correction factors evaluated using proton-proton collision data with an integrated luminosity of 41.5 fb-1 at √s = 13 TeV, collected by the CMS experiment in 2017. The closure of the method is tested by applying the measured correction factors on simulated data sets and checking the agreement between the adjusted simulation and collision data. Furthermore, a validation is performed by testing the method on pseudodata, which emulate various mismodelling conditions. The calibrated results enable the use of the full distributions of heavy-flavour identification algorithm outputs, e.g. as inputs to machine-learning models. Thus, they are expected to increase the sensitivity of future physics analyses.

Authors 99

1. A. Tumasyan

   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, Vienna, Austria

3. Janik Walter Andrejkovic

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik , Vienna , Austria

   Institut für Hochenergiephysik, Vienna, Austria

4. T. Bergauer

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik , Vienna , Austria

   Institut für Hochenergiephysik, Vienna, Austria

5. S. Chatterjee

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik , Vienna , Austria

   Institut für Hochenergiephysik, Vienna, Austria

6. M. Dragicevic

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik , Vienna , Austria

   Institut für Hochenergiephysik, Vienna, Austria

7. A. Escalante Del Valle

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik, Vienna, Austria

8. Rudolf Fruehwirth

   TU Wien · Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik, Vienna, Austria

   TU Wien, Wien, Austria

9. M. Jeitler

   TU Wien · Institute of High Energy Physics

   Affiliation as printed

   Institute for Nuclear Problems , Minsk , Belarus

   Institut für Hochenergiephysik, Vienna, Austria

   TU Wien, Wien, Austria

10. Natascha Krammer

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik , Vienna , Austria

    Institut für Hochenergiephysik, Vienna, Austria

11. L. Lechner

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik , Vienna , Austria

    Institut für Hochenergiephysik, Vienna, Austria

12. Dietrich Liko

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik , Vienna , Austria

    Institut für Hochenergiephysik, Vienna, Austria

13. I. Mikulec

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik , Vienna , Austria

    Institut für Hochenergiephysik, Vienna, Austria

14. P. Paulitsch

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik , Vienna , Austria

    Institut für Hochenergiephysik, Vienna, Austria

15. F. M. Pitters

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik , Vienna , Austria

    Institut für Hochenergiephysik, Vienna, Austria

16. J. Schieck

    TU Wien · Institute of High Energy Physics

    Affiliation as printed

    Institute for Nuclear Problems , Minsk , Belarus

    Institut für Hochenergiephysik, Vienna, Austria

    TU Wien, Wien, Austria

17. R. Schöfbeck

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik , Vienna , Austria

    Institut für Hochenergiephysik, Vienna, Austria

18. Markus Spanring

    Institute of High Energy Physics

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    Institut für Hochenergiephysik , Vienna , Austria

    Institut für Hochenergiephysik, Vienna, Austria

19. S. Templ

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik , Vienna , Austria

    Institut für Hochenergiephysik, Vienna, Austria

20. W. Waltenberger

    University of Antwerp · Institute of High Energy Physics

    Affiliation as printed

    Universiteit Antwerpen , Antwerpen , Belgium

    Institut für Hochenergiephysik, Vienna, Austria

21. C.-E. Wulz

    TU Wien · Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik , Vienna , Austria

    Institut für Hochenergiephysik, Vienna, Austria

    TU Wien, Wien, Austria

22. V. Chekhovsky

    University of Antwerp

    Affiliation as printed

    Universiteit Antwerpen , Antwerpen , Belgium

    Institute for Nuclear Problems, Minsk, Belarus

23. A. Litomin

    University of Antwerp

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    Universiteit Antwerpen , Antwerpen , Belgium

    Institute for Nuclear Problems, Minsk, Belarus

24. В. Макаренко

    University of Antwerp

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    Universiteit Antwerpen , Antwerpen , Belgium

    Institute for Nuclear Problems, Minsk, Belarus

25. M. R. Darwish

    University of Antwerp · Institut de Physique des 2 Infinis de Lyon · Arab Academy for Science, Technology, and Maritime Transport

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    Infinis de Lyon (IP2I ) , Villeurbanne , France

    Institute of Basic and Applied Sciences, Faculty of Engineering, Arab Academy for Science, Technology and Maritime Transport, Alexandria, Egypt

    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. Tomas Kello

    Université Libre de Bruxelles · University of Antwerp

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    Universiteit Antwerpen , Antwerpen , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

29. A. Lelek

    University of Antwerp

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    Universiteit Antwerpen , Antwerpen , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

30. Haifa Rejeb Sfar

    University of Antwerp

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    Universiteit Antwerpen , Antwerpen , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

31. P. Van Mechelen

    University of Antwerp

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    Universiteit Antwerpen , Antwerpen , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

32. Senne Van Putte

    Vrije Universiteit Brussel · University of Antwerp

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    Vrije Universiteit Brussel , Brussel , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

33. N. Van Remortel

    Vrije Universiteit Brussel · University of Antwerp

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    Vrije Universiteit Brussel , Brussel , Belgium

    Universiteit Antwerpen, Antwerpen, Belgium

34. F. Blekman

    Vrije Universiteit Brussel

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    Vrije Universiteit Brussel , Brussel , Belgium

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    Vrije Universiteit Brussel

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    Vrije Universiteit Brussel

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    Université Libre de Bruxelles · Vrije Universiteit Brussel

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    Université Libre de Bruxelles , Bruxelles , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

40. S. Lowette

    Vrije Universiteit Brussel

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    Vrije Universiteit Brussel , Brussel , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

41. S. Moortgat

    Vrije Universiteit Brussel

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    Vrije Universiteit Brussel , Brussel , Belgium

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42. A. Morton

    Université Libre de Bruxelles · Vrije Universiteit Brussel

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43. D. Müller

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    Université Libre de Bruxelles , Bruxelles , Belgium

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44. Abanti Ranadhir Sahasransu

    Université Libre de Bruxelles · Vrije Universiteit Brussel

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    Université Libre de Bruxelles , Bruxelles , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

45. S. Tavernier

    Université Libre de Bruxelles · Vrije Universiteit Brussel

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    Université Libre de Bruxelles , Bruxelles , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

46. Walter Van Doninck

    Vrije Universiteit Brussel

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    Vrije Universiteit Brussel , Brussel , Belgium

    Vrije Universiteit Brussel, Brussel, Belgium

47. P. Van Mulders

    Vrije Universiteit Brussel

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    Vrije Universiteit Brussel, Brussel, Belgium

48. Diego Beghin

    Université Libre de Bruxelles · Ghent University

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    Ghent University , Ghent , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

49. B. Bilin

    Université Libre de Bruxelles

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    Université Libre de Bruxelles , Bruxelles , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

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    Université Libre de Bruxelles

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    Université Libre de Bruxelles , Bruxelles , Belgium

    Université Libre de Bruxelles, Bruxelles, Belgium

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    Université Libre de Bruxelles

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    Université Libre de Bruxelles · UCLouvain

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    Université Libre de Bruxelles · Ghent University

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    Ghent University , Ghent , Belgium

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56. M. Mahdavikhorrami

    Université Libre de Bruxelles · Ghent University

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    Ghent University , Ghent , Belgium

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57. Inna Makarenko

    Université Libre de Bruxelles

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58. L. Moureaux

    Université Libre de Bruxelles

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    Université Libre de Bruxelles , Bruxelles , Belgium

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    Université Libre de Bruxelles · UCLouvain

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

    Université Libre de Bruxelles, Bruxelles, Belgium

62. Elizabeth Rose Starling

    Université Libre de Bruxelles · Ghent University

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63. Laurent Thomas

    Université Libre de Bruxelles · Ghent University

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    Université Libre de Bruxelles, Bruxelles, Belgium

64. M. Vanden Bemden

    Université Libre de Bruxelles

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    Université Libre de Bruxelles , Bruxelles , Belgium

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65. Catherine Vander Velde

    Université Libre de Bruxelles

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66. Pascal Vanlaer

    Université Libre de Bruxelles · UCLouvain

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

    Université Libre de Bruxelles, Bruxelles, Belgium

67. David Vannerom

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

    Université Libre de Bruxelles, Bruxelles, Belgium

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    Université Libre de Bruxelles · Ghent University

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    Université Libre de Bruxelles, Bruxelles, Belgium

69. T. Cornelis

    Ghent University

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    Ghent University , Ghent , Belgium

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    Ghent University

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    Ghent University , Ghent , Belgium

    Ghent University, Ghent, Belgium

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

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    Ghent University · UCLouvain

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

    Ghent University, Ghent, Belgium

76. Amrutha Samalan

    Ghent University

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78. M. Tytgat

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79. Willem Verbeke

    Ghent University · UCLouvain

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

    Ghent University, Ghent, Belgium

80. B. Vermassen

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81. Martina Vit

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82. Agni Bethani

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

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    Ghent University · UCLouvain

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    Ghent University , Ghent , Belgium

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84. F. Bury

    UCLouvain

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    UCLouvain

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    UCLouvain

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89. ANDREA GIAMMANCO

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    UCLouvain

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