Curvature-bias corrections using a pseudomass method

Journal of Instrumentation, vol. 19, pp. P03010

Abstract

Abstract Momentum measurements for very high momentum charged particles, such as muons from electroweak vector boson decays, are particularly susceptible to charge-dependent curvature biases that arise from misalignments of tracking detectors. Low momentum charged particles used in alignment procedures have limited sensitivity to coherent displacements of such detectors, and therefore are unable to fully constrain these misalignments to the precision necessary for studies of electroweak physics. Additional approaches are therefore required to understand and correct for these effects. In this paper the curvature biases present at the LHCb detector are studied using the pseudomass method in proton-proton collision data recorded at centre of mass energy √(s)=13 TeV during 2016, 2017 and 2018. The biases are determined using Z→μ + μ - decays in intervals defined by the data-taking period, magnet polarity and muon direction. Correcting for these biases, which are typically at the 10-4 GeV-1 level, improves the Z→μ + μ - mass resolution by roughly 18% and eliminates several pathological trends in the kinematic-dependence of the mean dimuon invariant mass.

Authors 100

1. R. Aaij

   National Institute for Subatomic Physics

   Affiliation as printed

   Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands

2. A. S. W. Abdelmotteleb

   University of Warwick

   Affiliation as printed

   Department of Physics, University of Warwick, Coventry, United Kingdom

3. C. Abellán Beteta

   University of Zurich

   Affiliation as printed

   Physik-Institut, Universität Zürich, Zürich, Switzerland

4. F. Abudinén

   University of Warwick

   Affiliation as printed

   Department of Physics, University of Warwick, Coventry, United Kingdom

5. T. Ackernley

   University of Liverpool

   Affiliation as printed

   Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom

6. B. Adeva

   Universidade de Santiago de Compostela

   Affiliation as printed

   Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain

7. M. Adinolfi

   University of Bristol

   Affiliation as printed

   H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom

8. P. Adlarson

   Uppsala University

   Affiliation as printed

   Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden, associated to 57

9. C. Agapopoulou

   European Organization for Nuclear Research

   Affiliation as printed

   European Organization for Nuclear Research (CERN), Geneva, Switzerland

10. C. Aidala

    University of Michigan

    Affiliation as printed

    University of Michigan, Ann Arbor, MI, United States, associated to 66

11. Z. Ajaltouni

    Centre National de la Recherche Scientifique · Université Clermont Auvergne · Laboratoire de Physique de Clermont Auvergne · Institut National de Physique Nucléaire et de Physique des Particules

    Affiliation as printed

    Université Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, France

12. S. Akar

    University of Cincinnati

    Affiliation as printed

    University of Cincinnati, Cincinnati, OH, United States

13. K. Carvalho Akiba

    National Institute for Subatomic Physics

    Affiliation as printed

    Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands

14. P. Albicocco

    Istituto Nazionale di Fisica Nucleare · Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati

    Affiliation as printed

    INFN Laboratori Nazionali di Frascati, Frascati, Italy

15. J. Albrecht

    TU Dortmund University

    Affiliation as printed

    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

16. F. Alessio

    European Organization for Nuclear Research

    Affiliation as printed

    European Organization for Nuclear Research (CERN), Geneva, Switzerland

17. Michael Thomas Alexander

    University of Glasgow

    Affiliation as printed

    School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom

18. A. Alfonso Albero

    Institut de Ciències del Cosmos · Universitat de Barcelona

    Affiliation as printed

    ICCUB, Universitat de Barcelona, Barcelona, Spain

19. Zakariya Aliouche

    University of Manchester

    Affiliation as printed

    Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom

20. P. Álvarez Cartelle

    University of Cambridge

    Affiliation as printed

    Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom

21. R. Amalric

    Centre National de la Recherche Scientifique · Sorbonne Université · Laboratoire de Physique Nucléaire et de Hautes Énergies · Institut National de Physique Nucléaire et de Physique des Particules

    Affiliation as printed

    LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France

22. S. Amato

    Universidade Federal do Rio de Janeiro

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    Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil

23. J. L. Amey

    University of Bristol

    Affiliation as printed

    H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom

24. Y. Amhis

    Centre National de la Recherche Scientifique · Université Paris-Saclay · Institut National de Physique Nucléaire et de Physique des Particules · Laboratoire de Physique des 2 Infinis Irène Joliot-Curie · European Organization for Nuclear Research

    Affiliation as printed

    European Organization for Nuclear Research (CERN), Geneva, Switzerland

    Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France

25. Liupan An

    Peking University · State Key Laboratory of Nuclear Physics and Technology

    Affiliation as printed

    School of Physics State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China

26. L. Anderlini

    Istituto Nazionale di Fisica Nucleare, Sezione di Firenze

    Affiliation as printed

    INFN Sezione di Firenze, Firenze, Italy

27. M. Andersson

    University of Zurich

    Affiliation as printed

    Physik-Institut, Universität Zürich, Zürich, Switzerland

28. A. Andreianov
    Affiliation as printed

    Affiliated with an institute covered by a cooperation agreement with CERN

29. P. Andreola

    University of Zurich

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    Physik-Institut, Universität Zürich, Zürich, Switzerland

30. M. Andreotti

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

    Affiliation as printed

    INFN Sezione di Ferrara, Ferrara, Italy

31. D. Andreou

    Syracuse University

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    Syracuse University, Syracuse, NY, United States

32. Alessia Anelli

    Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca

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    INFN Sezione di Milano-Bicocca, Milano, Italy

33. D. Ao

    University of Chinese Academy of Sciences

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    University of Chinese Academy of Sciences, Beijing, China

34. F. Archilli

    Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata

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    INFN Sezione di Roma Tor Vergata, Roma, Italy

35. Matteo Argenton

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

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    INFN Sezione di Ferrara, Ferrara, Italy

36. S. Arguedas Cuendis

    Consejo Nacional de Rectores

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    Consejo Nacional de Rectores (CONARE), San Jose, Costa Rica

37. A. Artamonov
    Affiliation as printed

    Affiliated with an institute covered by a cooperation agreement with CERN

38. M. Artuso

    Syracuse University

    Affiliation as printed

    Syracuse University, Syracuse, NY, United States

39. E. Aslanides

    Centre National de la Recherche Scientifique · Aix-Marseille Université · Centre de physique des particules de Marseille · Institut National de Physique Nucléaire et de Physique des Particules

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    Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France

40. M. Atzeni

    Massachusetts Institute of Technology

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    Massachusetts Institute of Technology, Cambridge, MA, United States

41. B. Audurier

    Centre National de la Recherche Scientifique · École Polytechnique · Institut National de Physique Nucléaire et de Physique des Particules · Institut Polytechnique de Paris · Laboratoire Leprince-Ringuet

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    Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France

42. D. Bacher

    University of Oxford

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    Department of Physics, University of Oxford, Oxford, United Kingdom

43. I. Bachiller

    Centre National de la Recherche Scientifique · Laboratoire d’Annecy de Physique des Particules · Institut National de Physique Nucléaire et de Physique des Particules · Université Savoie Mont Blanc

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    Université Savoie Mont Blanc, CNRS, IN2P3-LAPP, Annecy, France

44. S. Bachmann

    Heidelberg University

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    Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany

45. Marie Bachmayer

    École Polytechnique Fédérale de Lausanne

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    Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

46. John J Back

    University of Warwick

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    Department of Physics, University of Warwick, Coventry, United Kingdom

47. P. Baladrón Rodríguez

    Universidade de Santiago de Compostela

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    Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain

48. V. Balagura

    Centre National de la Recherche Scientifique · École Polytechnique · Institut National de Physique Nucléaire et de Physique des Particules · Institut Polytechnique de Paris · Laboratoire Leprince-Ringuet

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    Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France

49. W. Baldini

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

    Affiliation as printed

    INFN Sezione di Ferrara, Ferrara, Italy

50. J. Baptista de Souza Leite

    Centro Brasileiro de Pesquisas Físicas

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    Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil

51. M. Barbetti

    Istituto Nazionale di Fisica Nucleare, Sezione di Firenze

    Affiliation as printed

    INFN Sezione di Firenze, Firenze, Italy

52. I. R. Barbosa

    Pontifícia Universidade Católica do Rio de Janeiro

    Affiliation as printed

    Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil, associated to 3

53. Roger John Barlow

    University of Manchester

    Affiliation as printed

    Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom

54. S. Barsuk

    Centre National de la Recherche Scientifique · Université Paris-Saclay · Institut National de Physique Nucléaire et de Physique des Particules · Laboratoire de Physique des 2 Infinis Irène Joliot-Curie

    Affiliation as printed

    Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France

55. W. Barter

    University of Edinburgh

    Affiliation as printed

    School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom

56. M. Bartolini

    University of Cambridge

    Affiliation as printed

    Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom

57. Justin Bartz

    Syracuse University

    Affiliation as printed

    Syracuse University, Syracuse, NY, United States

58. F. Baryshnikov
    Affiliation as printed

    Affiliated with an institute covered by a cooperation agreement with CERN

59. J. M. Basels Aachen I. Physikalisches Institut

    RWTH Aachen University

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    I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany

60. G. Bassi

    Istituto Nazionale di Fisica Nucleare, Sezione di Pisa

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    INFN Sezione di Pisa, Pisa, Italy

61. B. Batsukh

    Institute of High Energy Physics

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    Institute Of High Energy Physics (IHEP), Beijing, China

62. A. Battig

    TU Dortmund University

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    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

63. A. Bay

    École Polytechnique Fédérale de Lausanne

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    Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

64. A. Beck

    University of Warwick

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    Department of Physics, University of Warwick, Coventry, United Kingdom

65. M. Becker

    TU Dortmund University

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    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

66. F. Bedeschi

    Istituto Nazionale di Fisica Nucleare, Sezione di Pisa

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    INFN Sezione di Pisa, Pisa, Italy

67. I. Bediaga

    Centro Brasileiro de Pesquisas Físicas

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    Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil

68. A. Beiter

    Syracuse University

    Affiliation as printed

    Syracuse University, Syracuse, NY, United States

69. S. Belin

    Universidade de Santiago de Compostela

    Affiliation as printed

    Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain

70. V. Bellée

    University of Zurich

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    Physik-Institut, Universität Zürich, Zürich, Switzerland

71. K. Belous
    Affiliation as printed

    Affiliated with an institute covered by a cooperation agreement with CERN

72. I. Belov

    Istituto Nazionale di Fisica Nucleare, Sezione di Genova

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    INFN Sezione di Genova, Genova, Italy

73. I. Belyaev
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    Affiliated with an institute covered by a cooperation agreement with CERN

74. G. Benane

    Centre National de la Recherche Scientifique · Aix-Marseille Université · Centre de physique des particules de Marseille · Institut National de Physique Nucléaire et de Physique des Particules

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    Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France

75. G. Bencivenni

    Istituto Nazionale di Fisica Nucleare · Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati

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    INFN Laboratori Nazionali di Frascati, Frascati, Italy

76. E. Ben-Haim

    Centre National de la Recherche Scientifique · Sorbonne Université · Laboratoire de Physique Nucléaire et de Hautes Énergies · Institut National de Physique Nucléaire et de Physique des Particules

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    LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France

77. Alexander Berezhnoy
    Affiliation as printed

    Affiliated with an institute covered by a cooperation agreement with CERN

78. R. Bernet

    University of Zurich

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    Physik-Institut, Universität Zürich, Zürich, Switzerland

79. Sergi Bernet Andrés

    Universitat Ramon Llull

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    DS4DS, La Salle, Universitat Ramon Llull, Barcelona, Spain

80. C. Bertella

    University of Manchester

    Affiliation as printed

    Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom

81. A. Bertolin

    University of Padua · Istituto Nazionale di Fisica Nucleare, Sezione di Padova

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    Università degli Studi di Padova, Università e INFN, Padova, Padova, Italy

82. C. Betancourt

    University of Zurich

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    Physik-Institut, Universität Zürich, Zürich, Switzerland

83. F. Betti

    University of Edinburgh

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    School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom

84. J. Bex

    University of Cambridge

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    Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom

85. Ia. Bezshyiko

    University of Zurich

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    Physik-Institut, Universität Zürich, Zürich, Switzerland

86. J. Bhom

    Institute of Nuclear Physics, Polish Academy of Sciences

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    Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland

87. M. S. Bieker

    TU Dortmund University

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    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

88. N. V. Biesuz

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

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    INFN Sezione di Ferrara, Ferrara, Italy

89. P. Billoir

    Centre National de la Recherche Scientifique · Sorbonne Université · Laboratoire de Physique Nucléaire et de Hautes Énergies · Institut National de Physique Nucléaire et de Physique des Particules

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    LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France

90. Alice Biolchini

    National Institute for Subatomic Physics

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    Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands

91. M. Birch

    Imperial College London

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    Imperial College London, London, United Kingdom

92. F. C. R. Bishop

    Centre National de la Recherche Scientifique · Laboratoire d’Annecy de Physique des Particules · Institut National de Physique Nucléaire et de Physique des Particules · Université Savoie Mont Blanc

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    Université Savoie Mont Blanc, CNRS, IN2P3-LAPP, Annecy, France

93. A. Bitadze

    University of Manchester

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    Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom

94. A. Bizzeti
95. Michele Piero Blago

    University of Cambridge

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    Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom

96. Thomas Blake

    University of Warwick

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    Department of Physics, University of Warwick, Coventry, United Kingdom

97. F. Blanc

    École Polytechnique Fédérale de Lausanne

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    Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

98. J. E. Blank

    TU Dortmund University

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    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

99. Steven Roy Blusk

    Syracuse University

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    Syracuse University, Syracuse, NY, United States

100. D. Bobulska

     University of Glasgow

     Affiliation as printed

     School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom