@article{33f51d3c6db6471ab83c6752cf29c89e,
title = "Searches for violation of Lorentz invariance in top quark pair production using dilepton events in 13 TeV proton-proton collisions",
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 a 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 fb−1, 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 place upper limits at 68% confidence level on the magnitude of the Lorentz-violating couplings ranging from 1–8×10−3. 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 to two orders of magnitude with respect to previous searches conducted at the Tevatron.",
keywords = "Beyond standard model, CMS, Lorentz symmetry, Top quark",
author = "{The CMS collaboration} and A. Hayrapetyan and A. Tumasyan and W. Adam and Andrejkovic, {J. W.} and T. Bergauer and S. Chatterjee and K. Damanakis and M. Dragicevic and Hussain, {P. S.} and M. Jeitler and N. Krammer and A. Li and D. Liko and I. Mikulec and J. Schieck and R. Sch{\"o}fbeck and D. Schwarz and M. Sonawane and S. Templ and W. Waltenberger and Wulz, {C. E.} and Darwish, {M. R.} and T. Janssen and {Van Mechelen}, P. and Bols, {E. S.} and J. D'Hondt and S. Dansana and {De Moor}, A. and M. Delcourt and {El Faham}, H. and S. Lowette and I. Makarenko and D. M{\"u}ller and Sahasransu, {A. R.} and S. Tavernier and M. Tytgat and {Van Onsem}, {G. P.} and {Van Putte}, S. and D. Vannerom and B. Clerbaux and Das, {A. K.} and {De Lentdecker}, G. and L. Favart and P. Gianneios and D. Hohov and J. Jaramillo and A. Khalilzadeh and K. Lee and Kuo, {C. M.} and W. Lin",
note = "Publisher Copyright: {\textcopyright} 2024 CERN for the benefit of the CMS Collaboration",
year = "2024",
month = oct,
doi = "10.1016/j.physletb.2024.138979",
language = "???core.languages.en_GB???",
volume = "857",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
}