Search for medium effects using jet axis decorrelation in inclusive jets from PbPb collisions at $$\sqrt{{s}_{\text{NN}}}$$ = 5.02 TeV

Journal of High Energy Physics, vol. 2025

Abstract

A bstract The jet axis decorrelation in inclusive jets is studied using lead-lead (PbPb) collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The jet axis decorrelation is defined as the angular difference between two definitions of the jet axis. It is obtained by applying two recombination schemes on all the constituents of a given jet reconstructed by the anti- k T sequential algorithm with a distance parameter of R = 0 . 4. The data set, corresponding to an integrated luminosity of 0.66 nb − 1 , was collected in 2018 with the CMS detector at the CERN LHC. The jet axis decorrelations are examined across collision centrality selections and intervals of jet transverse momentum. A centrality dependent evolution of the measured distributions is observed, with a progressive narrowing seen in more central events. This narrowing could result from medium-induced modification of the internal jet structure or reflect color charge effects in energy loss. This new measurement probes jet substructure in previously unexplored kinematic domains and show great promise for providing new insights on the color charge dependence of energy loss to jet-quenching models.

Authors 96

1. V. Chekhovsky

   A. Alikhanyan National Laboratory

   Affiliation as printed

   Yerevan Physics Institute

2. A. Hayrapetyan

   A. Alikhanyan National Laboratory

   Affiliation as printed

   Yerevan Physics Institute

3. В. Макаренко

   A. Alikhanyan National Laboratory

   Affiliation as printed

   Yerevan Physics Institute

4. A. Tumasyan

   A. Alikhanyan National Laboratory · Yerevan State University

   Affiliation as printed

   Yerevan Physics Institute

   Yerevan State University

5. W. Adam

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik

6. Janik Walter Andrejkovic

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik

7. L. Benato

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik

8. T. Bergauer

   Institute of High Energy Physics

   Affiliation as printed

   Institut für Hochenergiephysik

9. S. Chatterjee

   Indian Institute of Technology Madras · Institute of High Energy Physics

   Affiliation as printed

   Indian Institute of Technology Madras

   Institut für Hochenergiephysik

10. K. Damanakis

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

11. M. Dragicevic

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

12. Priya Sajid Hussain

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

13. M. Jeitler

    TU Wien · Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

    TU Wien

14. Natascha Krammer

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

15. 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

16. Dietrich Liko

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

17. I. Mikulec

    Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

18. J. Schieck

    TU Wien · Institute of High Energy Physics

    Affiliation as printed

    Institut für Hochenergiephysik

    TU Wien

19. Dennis Schwarz

    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. T. Van Laer

    University of Antwerp

    Affiliation as printed

    Universiteit Antwerpen

26. P. Van Mechelen

    University of Antwerp

    Affiliation as printed

    Universiteit Antwerpen

27. Nordin Breugelmans

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

28. J. D’Hondt

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

29. Soumya Dansana

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

30. A. De Moor

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

31. M. Delcourt

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

32. Felix Heyen

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

33. Y. Hong

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

34. S. Lowette

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

35. Inna Makarenko

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

36. D. Müller

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

37. S. Tavernier

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

38. M. Tytgat

    Vrije Universiteit Brussel · Ghent University

    Affiliation as printed

    Ghent University

    Vrije Universiteit Brussel

39. G. P. Van Onsem

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

40. Senne Van Putte

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

41. David Vannerom

    Vrije Universiteit Brussel

    Affiliation as printed

    Vrije Universiteit Brussel

42. B. Bilin

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

43. B. Clerbaux

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

44. Abhishek Das

    University of Notre Dame · Université Libre de Bruxelles

    Affiliation as printed

    University of Notre Dame

    Université Libre de Bruxelles

45. I. De Bruyn

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

46. G. De Lentdecker

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

47. Hugues Evard

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

48. L. Favart

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

49. P. Gianneios

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

50. Ali Khalilzadeh

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

51. Fakhri Alam Khan

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

52. Andrea Malara

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

53. Hafiz Muhammad Aamir Shahzad

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

54. Laurent Thomas

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

55. M. Vanden Bemden

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

56. Catherine Vander Velde

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

57. Pascal Vanlaer

    Université Libre de Bruxelles

    Affiliation as printed

    Université Libre de Bruxelles

58. M. De Coen

    Ghent University

    Affiliation as printed

    Ghent University

59. D. Dobur

    Ghent University

    Affiliation as printed

    Ghent University

60. G. Gökbulut

    Ghent University

    Affiliation as printed

    Ghent University

61. J. Knolle

    Ghent University

    Affiliation as printed

    Ghent University

62. Luka Lambrecht

    Ghent University

    Affiliation as printed

    Ghent University

63. David Marckx

    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. Jan van der Linden

    Ghent University

    Affiliation as printed

    Ghent University

67. Jean‐Marc Vanden‐Broeck

    Ghent University

    Affiliation as printed

    Ghent University

68. Liam Wezenbeek

    Ghent University

    Affiliation as printed

    Ghent University

69. S. Bein

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

70. A. Benecke

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

71. Agni Bethani

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

72. G. Bruno

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

73. C. Caputo

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

74. J. De Favereau De Jeneret

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

75. Christophe Delaere

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

76. I. S. Donertas

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

77. ANDREA GIAMMANCO

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

78. Ahmet Oguz Guzel

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

79. V. Lemaitre

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

80. Jindrich Lidrych

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

81. Paola Mastrapasqua

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

82. T. T. Tran

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

83. S. Turkcapar

    UCLouvain

    Affiliation as printed

    Université Catholique de Louvain

84. E. Coelho

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

85. G. Correia Silva

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

86. C. Hensel

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

87. T. Menezes De Oliveira

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

88. 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

89. P. Rebello Teles

    Centro Brasileiro de Pesquisas Físicas

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

90. E. J. Tonelli Manganote

    Centro Brasileiro de Pesquisas Físicas · Centro Universitário FACAMP

    Affiliation as printed

    Centro Brasileiro de Pesquisas Fisicas

    FACAMP — Faculdades de Campinas

91. 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

92. W. L. Aldá Júnior

    Universidade do Estado do Rio de Janeiro

    Affiliation as printed

    Universidade do Estado do Rio de Janeiro

93. M. Barroso Ferreira Filho

    Universidade do Estado do Rio de Janeiro

    Affiliation as printed

    Universidade do Estado do Rio de Janeiro

94. H. Brandao Malbouisson

    Universidade do Estado do Rio de Janeiro

    Affiliation as printed

    Universidade do Estado do Rio de Janeiro

95. W. Carvalho

    Universidade do Estado do Rio de Janeiro

    Affiliation as printed

    Universidade do Estado do Rio de Janeiro

96. J. Chinellato

    Universidade Estadual de Campinas (UNICAMP) · Universidade do Estado do Rio de Janeiro

    Affiliation as printed

    Universidade Estadual de Campinas

    Universidade do Estado do Rio de Janeiro