Item request has been placed! ×
Item request cannot be made. ×
loading  Processing Request

Observation of triple J/ψ meson production in proton-proton collisions

Item request has been placed! ×
Item request cannot be made. ×
loading   Processing Request
اقرأ أكثر حفظ في قائمتي
  • معلومة اضافية
    • بيانات النشر:
      Springer Nature
    • الموضوع:
      2023
    • Collection:
      Brunel University London: Brunel University Research Archive (BURA)
    • نبذة مختصرة :
      Data availability: Tabulated results are provided in the HEPData record for this analysis71. Release and preservation of data used by the CMS Collaboration as the basis for publications is guided by the CMS policy as stated in CMS data preservation, re-use and open access policy. ; Code availability: The CMS core software is publically available at https://github.com/cms-sw/cmssw. ; Copyright . Protons consist of three valence quarks, two up-quarks and one down-quark, held together by gluons and a sea of quark-antiquark pairs. Collectively, quarks and gluons are referred to as partons. In a proton-proton collision, typically only one parton of each proton undergoes a hard scattering – referred to as single-parton scattering – leaving the remainder of each proton only slightly disturbed. Here, we report the study of double- and triple-parton scatterings through the simultaneous production of three J/ψ mesons, which consist of a charm quark-antiquark pair, in proton-proton collisions recorded with the CMS experiment at the Large Hadron Collider. We observed this process – reconstructed through the decays of J/ψ mesons into pairs of oppositely charged muons – with a statistical significance above five standard deviations. We measured the inclusive fiducial cross-section to be 272+141−104(stat)±17(syst)fb, and compared it to theoretical expectations for triple-J/ψ meson production in single-, double- and triple-parton scattering scenarios. Assuming factorization of multiple hard-scattering probabilities in terms of single-parton scattering cross-sections, double- and triple-parton scattering are the dominant contributions for the measured process. ; SCOAP3. ; Change history: 27 February 2023A Correction to this paper has been published: https://doi.org/10.1038/s41567-023-01992-x
    • File Description:
      Print-Electronic
    • ISSN:
      1745-2473
      1745-2481
    • Relation:
      Nature Physics; ORCID iDs: Joanne E. Cole orcid:0000-0001-5638-7599; Akram Khan orcid:0000-0002-4597-4402; Paul Kyberd orcid:0000-0002-7353-7090; Ivan D. Reid orcid:0000-0002-9235-779X; Liliana Teodorescu orcid:0000-0002-6974-6201.; Tumasyan, A. et al. for the benefit of the CMS Collaboration (2023) 'Observation of triple J/ψ meson production in proton-proton collisions', Nature Physics, 19, pp. 338–350. doi:10.1038/s41567-022-01838-y.; https://bura.brunel.ac.uk/handle/2438/26570; https://doi.org/10.1038/s41567-022-01838-y
    • الرقم المعرف:
      10.1038/s41567-022-01838-y
    • Rights:
      Copyright © CERN 2023, for the benefit of the CMS Collaboration 2023. Rights and permissions: Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/. ; https://creativecommons.org/licenses/by/4.0/ ; CERN, for the benefit of the CMS Collaboration
    • الرقم المعرف:
      edsbas.92BC54EB