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Article
Report number arXiv:2405.14757 ; CMS-TOP-22-007 ; CERN-EP-2024-085 ; CMS-TOP-22-007-004
Title Searches for violation of Lorentz invariance in top quark pair production using dilepton events in 13 TeV proton-proton collisions
Related titleSearches for violation of Lorentz invariance in tt¯ production using dilepton events in proton-proton collisions at s= 13 TeV
Author(s) CMS Collaboration  Vis alle 2331 forfattere
Corporate Author(s) CMS Collaboration
Publication 2024-08-23
Imprint 23 May 2024
Number of pages 28
Note All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-22-007 (CMS Public Pages)
In: Phys. Lett. B 857 (2024) 138979
DOI 10.1016/j.physletb.2024.138979 (publication)
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; CMS
Free keywords top physics
Abstract A search for violation of Lorentz invariance in the production of top quark pairs (tt¯) is presented. The measured normalized differential tt¯ production cross section, as function of the sidereal time, is examined for potential modulations induced by Lorentz-invariance breaking operators in an effective field theory extension of the standard model (SM). The cross section is measured from collision events collected by the CMS detector at a center-of-mass-energy of 13 TeV, corresponding to an integrated luminosity of 77.8 fb1, and containing one electron and one muon. The results are found to be compatible with zero, in agreement with the SM, and are used to bound the Lorentz-violating couplings to be in ranges of 1-8 × 103 at 68% confidence level. This is the first precision test of the isotropy in special relativity with top quarks at the LHC, restricting further the bounds on such couplings by up two orders of magnitude with respect to previous searches conducted at the Tevatron.
Related document supersedes: CMS-PAS-TOP-22-007
Copyright/License Preprint: © 2024-2025 CERN (License: CC-BY-4.0)
Publication: © 2024-2025 CERN (License: CC BY 4.0), sponsored by SCOAP³



Corresponding record in: Inspire
Email contact: cms-publication-committee-chair@cern.ch


 Element opprettet 2024-05-23, sist endret 2024-12-26


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