Open charm production and asymmetry in pNe collisions at $$\sqrt{s_{\scriptscriptstyle {\textrm{NN}}}} = 68.5$$ $$\,\text {Ge\hspace{-1.00006pt}V}$$

The European Physical Journal C, vol. 83

Abstract

Abstract A measurement of $${{D}} ^0$$ D 0 meson production by the LHCb experiment in its fixed-target configuration is presented. The production of $${{D}} ^0$$ D 0 mesons is studied with a beam of 2.5 $$\,\text {Te\hspace{-1.00006pt}V}$$ Te V protons colliding on a gaseous neon target at rest, corresponding to a nucleon–nucleon centre-of-mass energy of $$\sqrt{s_{\scriptscriptstyle \text {NN}}} = 68.5\,\,\text {Ge\hspace{-1.00006pt}V} $$ s NN = 68.5 Ge V . The sum of the $${{D}} ^0$$ D 0 and $${\hspace{0.0pt}\overline{\hspace{0.0pt}{D}}} {}^0$$ D ¯ 0 production cross-section in $$p\text {Ne}$$ p Ne collisions in the centre-of-mass rapidity range $$y^{\star }\in [-2.29, 0]$$ y ⋆ ∈ [ - 2.29 , 0 ] is found to be $$\sigma _{D^{0}}^{y^\star \in [-2.29, 0]} = 48.2 \pm 0.3 \pm 4.5 \,\upmu \text {b}/\text {nucleon}$$ σ D 0 y ⋆ ∈ [ - 2.29 , 0 ] = 48.2 ± 0.3 ± 4.5 μ b / nucleon where the first uncertainty is statistical and the second is systematic. The $${{{D}} ^0}-{{\hspace{0.0pt}\overline{\hspace{0.0pt}{D}}} {}^0} $$ D 0 - D ¯ 0 production asymmetry is also evaluated and suggests a trend towards negative values at large negative $$y^{\star }$$ y ⋆ . The considered models do not account precisely for all the features observed in the LHCb data, but theoretical predictions including 1 $$\%$$ % intrinsic charm and 10 $$\%$$ % recombination contributions better describe the data than the other models considered.

Authors 100

1. R. Aaij

   National Institute for Subatomic Physics

   Affiliation as printed

   Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands

2. A. S. W. Abdelmotteleb

   Rutherford Appleton Laboratory

   Affiliation as printed

   STFC Rutherford Appleton Laboratory, Didcot, UK

3. C. Abellán Beteta

   Kharkiv Institute of Physics and Technology

   Affiliation as printed

   NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine

4. F. Abudinén

   Rutherford Appleton Laboratory

   Affiliation as printed

   STFC Rutherford Appleton Laboratory, Didcot, UK

5. T. Ackernley

   Imperial College London

   Affiliation as printed

   Imperial College London, London, UK

6. B. Adeva

   Universitat de València · Instituto de Física Corpuscular

   Affiliation as printed

   Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia-CSIC, Valencia, Spain

7. M. Adinolfi

   University of Cambridge

   Affiliation as printed

   Cavendish Laboratory, University of Cambridge, Cambridge, UK

8. P. Adlarson

   University of Michigan

   Affiliation as printed

   University of Michigan, Ann Arbor, MI, USA

9. H. Afsharnia

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

   Affiliation as printed

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

10. C. Agapopoulou

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

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

11. C. Aidala

    Universidade de Brasília

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    Universidade de Brasília, Brasília, Brazil

12. Z. Ajaltouni

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

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

13. S. Akar

    University of Maryland, College Park

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    University of Maryland, College Park, MD, USA

14. K. Carvalho Akiba

    National Institute for Subatomic Physics

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    Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands

15. J. Albrecht

    TU Dortmund University

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    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

16. F. Alessio

    École Polytechnique Fédérale de Lausanne

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

17. Michael Thomas Alexander

    University of Liverpool

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    Oliver Lodge Laboratory, University of Liverpool, Liverpool, UK

18. A. Alfonso Albero

    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

19. Zakariya Aliouche

    University of Oxford

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    Department of Physics, University of Oxford, Oxford, UK

20. P. Álvarez Cartelle

    University of Warwick

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    Department of Physics, University of Warwick, Coventry, UK

21. R. Amalric

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

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    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 Cambridge

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    Cavendish Laboratory, University of Cambridge, Cambridge, UK

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

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

25. Liupan An

    Tsinghua University

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    Center for High Energy Physics, Tsinghua University, Beijing, China

26. L. Anderlini

    Istituto Nazionale di Fisica Nucleare, Sezione di Firenze

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    INFN Sezione di Firenze, Florence, Italy

27. M. Andersson

    Kharkiv Institute of Physics and Technology

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    NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine

28. A. Andreianov

    European Organization for Nuclear Research · Institut de Ciències del Cosmos · Universitat de Barcelona

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    Institute Covered by a Cooperation Agreement with CERN, ICCUB, Universitat de Barcelona, Barcelona, Spain

29. M. Andreotti

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

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    INFN Sezione di Ferrara, Ferrara, Italy

30. D. Andreou

    Monash University

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    School of Physics and Astronomy, Monash University, Melbourne, Australia

31. D. Ao

    Institute of High Energy Physics · University of Chinese Academy of Sciences

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

    University of Chinese Academy of Sciences, Beijing, China

32. F. Archilli

    Heidelberg University

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

33. A. Artamonov

    European Organization for Nuclear Research · Institut de Ciències del Cosmos · Universitat de Barcelona

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    Institute Covered by a Cooperation Agreement with CERN, ICCUB, Universitat de Barcelona, Barcelona, Spain

34. M. Artuso

    Monash University

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    School of Physics and Astronomy, Monash University, Melbourne, Australia

35. E. Aslanides

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

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

36. M. Atzeni

    Kharkiv Institute of Physics and Technology

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    NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine

37. B. Audurier

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

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

38. S. Bachmann

    Heidelberg University

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

39. Marie Bachmayer

    University of Zurich

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    Physik-Institut, Universität Zürich, Zurich, Switzerland

40. John J Back

    Rutherford Appleton Laboratory

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    STFC Rutherford Appleton Laboratory, Didcot, UK

41. A. Bailly-reyre

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

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

42. P. Baladrón Rodríguez

    Universitat de València · Instituto de Física Corpuscular

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    Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia-CSIC, Valencia, Spain

43. V. Balagura

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

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

44. W. Baldini

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

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    INFN Sezione di Ferrara, Ferrara, Italy

45. J. Baptista de Souza Leite

    Centro Brasileiro de Pesquisas Físicas

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

46. M. Barbetti

    Istituto Nazionale di Fisica Nucleare, Sezione di Firenze

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    INFN Sezione di Firenze, Florence, Italy

47. Roger John Barlow

    University of Oxford

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    Department of Physics, University of Oxford, Oxford, UK

48. 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

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

49. W. Barter

    University of Manchester

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    Department of Physics and Astronomy, University of Manchester, Manchester, UK

50. M. Bartolini

    University of Warwick

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    Department of Physics, University of Warwick, Coventry, UK

51. F. Baryshnikov

    European Organization for Nuclear Research · Institut de Ciències del Cosmos · Universitat de Barcelona

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    Institute Covered by a Cooperation Agreement with CERN, ICCUB, Universitat de Barcelona, Barcelona, Spain

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

    RWTH Aachen University

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

53. G. Bassi

    Istituto Nazionale di Fisica Nucleare, Sezione di Pisa · University of Pisa

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    INFN Sezione di Pisa, Pisa, Italy

    Università di Pisa, Pisa, Italy

54. B. Batsukh

    Institute of High Energy Physics

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

55. A. Battig

    TU Dortmund University

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    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

56. A. Bay

    European Organization for Nuclear Research · Institut de Ciències del Cosmos · Universitat de Barcelona

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    Institute Covered by a Cooperation Agreement with CERN, ICCUB, Universitat de Barcelona, Barcelona, Spain

57. A. Beck

    TU Dortmund University

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    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

58. M. Becker

    TU Dortmund University

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    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

59. F. Bedeschi

    Istituto Nazionale di Fisica Nucleare, Sezione di Pisa

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    INFN Sezione di Pisa, Pisa, Italy

60. I. Bediaga

    Centro Brasileiro de Pesquisas Físicas

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

61. A. Beiter

    Monash University

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    School of Physics and Astronomy, Monash University, Melbourne, Australia

62. V. Belavin

    European Organization for Nuclear Research · Institut de Ciències del Cosmos · Universitat de Barcelona

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    Institute Covered by a Cooperation Agreement with CERN, ICCUB, Universitat de Barcelona, Barcelona, Spain

63. S. Belin

    Universitat de València · Instituto de Física Corpuscular

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    Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia-CSIC, Valencia, Spain

64. V. Bellée

    Kharkiv Institute of Physics and Technology

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    NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine

65. K. Belous

    European Organization for Nuclear Research · Institut de Ciències del Cosmos · Universitat de Barcelona

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    Institute Covered by a Cooperation Agreement with CERN, ICCUB, Universitat de Barcelona, Barcelona, Spain

66. I. Belov

    European Organization for Nuclear Research · Institut de Ciències del Cosmos · Universitat de Barcelona

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67. I. Belyaev

    European Organization for Nuclear Research · Institut de Ciències del Cosmos · Universitat de Barcelona

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    Institute Covered by a Cooperation Agreement with CERN, ICCUB, Universitat de Barcelona, Barcelona, Spain

68. G. Benane

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

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

69. G. Bencivenni

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

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    INFN Laboratori Nazionali di Frascati, Frascati, Italy

70. E. Ben-Haim

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

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

71. Alexander Berezhnoy

    European Organization for Nuclear Research · Institut de Ciències del Cosmos · Universitat de Barcelona

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    Institute Covered by a Cooperation Agreement with CERN, ICCUB, Universitat de Barcelona, Barcelona, Spain

72. R. Bernet

    Kharkiv Institute of Physics and Technology

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    NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine

73. Sergi Bernet Andrés

    Uppsala University

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    Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden

74. D. Berninghoff

    Heidelberg University

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

75. H. C. Bernstein

    Monash University

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    School of Physics and Astronomy, Monash University, Melbourne, Australia

76. C. Bertella

    University of Oxford

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    Department of Physics, University of Oxford, Oxford, UK

77. 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, Padua, Italy

78. C. Betancourt

    Kharkiv Institute of Physics and Technology

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    NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine

79. F. Betti

    École Polytechnique Fédérale de Lausanne

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

80. Ia. Bezshyiko

    Kharkiv Institute of Physics and Technology

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    NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine

81. S. Bhasin

    University of Cambridge

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    Cavendish Laboratory, University of Cambridge, Cambridge, UK

82. 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

83. L. Bian

    Universidad Nacional de Colombia

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    Departamento de Fisica, Universidad Nacional de Colombia, Bogotá, Colombia

84. M. S. Bieker

    TU Dortmund University

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    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

85. N. V. Biesuz

    Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara

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    INFN Sezione di Ferrara, Ferrara, Italy

86. S. Bifani

    University of Bristol

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    H.H. Wills Physics Laboratory, University of Bristol, Bristol, UK

87. P. Billoir

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

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

88. Alice Biolchini

    National Institute for Subatomic Physics

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    Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands

89. M. Birch

    University of Manchester

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    Department of Physics and Astronomy, University of Manchester, Manchester, UK

90. F. C. R. Bishop

    University of Warwick

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    Department of Physics, University of Warwick, Coventry, UK

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    University of Oxford

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    Department of Physics, University of Oxford, Oxford, UK

92. A. Bizzeti
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    University of Warwick

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    Department of Physics, University of Warwick, Coventry, UK

94. Thomas Blake

    Rutherford Appleton Laboratory

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    STFC Rutherford Appleton Laboratory, Didcot, UK

95. F. Blanc

    University of Zurich

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    Physik-Institut, Universität Zürich, Zurich, Switzerland

96. J. E. Blank

    TU Dortmund University

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    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

97. Steven Roy Blusk

    Monash University

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    School of Physics and Astronomy, Monash University, Melbourne, Australia

98. D. Bobulska

    University of Liverpool

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    Oliver Lodge Laboratory, University of Liverpool, Liverpool, UK

99. J. A. Boelhauve

    TU Dortmund University

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    Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany

100. O. Boente García

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

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