@article{d4aa39bd4d7149c186d5b51471fedc06,
title = "Probing effective field theory operators in the associated production of top quarks with a Z boson in multilepton final states at √s = 13 TeV",
abstract = "A search for new top quark interactions is performed within the framework of an effective field theory using the associated production of either one or two top quarks with a Z boson in multilepton final states. The data sample corresponds to an integrated luminosity of 138 fb−1 of proton-proton collisions at s = 13 TeV collected by the CMS experiment at the LHC. Five dimension-six operators modifying the electroweak interactions of the top quark are considered. Novel machine-learning techniques are used to enhance the sensitivity to effects arising from these operators. Distributions used for the signal extraction are parameterized in terms of Wilson coefficients describing the interaction strengths of the operators. All five Wilson coefficients are simultaneously fit to data and 95% confidence level intervals are computed. All results are consistent with the SM expectations. [Figure not available: see fulltext.]",
keywords = "Hadron-Hadron scattering (experiments), Top physics",
author = "{The CMS collaboration} and N. Tonon and {Aarup Petersen}, H. and {Aldaya Martin}, M. and P. Asmuss and S. Baxter and M. Bayatmakou and O. Behnke and {Berm{\'u}dez Mart{\'i}nez}, A. and S. Bhattacharya and {Bin Anuar}, {A. A.} and K. Borras and D. Brunner and A. Campbell and A. Cardini and C. Cheng and F. Colombina and {Consuegra Rodr{\'i}guez}, S. and {Correia Silva}, G. and V. Danilov and {De Silva}, M. and L. Didukh and G. Eckerlin and D. Eckstein and {Estevez Banos}, {L. I.} and O. Filatov and E. Gallo and A. Geiser and A. Giraldi and A. Grohsjean and M. Guthoff and A. Jafari and Jomhari, {N. Z.} and H. Jung and A. Kasem and M. Kasemann and H. Kaveh and C. Kleinwort and D. Kr{\"u}cker and W. Lange and J. Lidrych and K. Lipka and W. Lohmann and R. Mankel and Melzer-Pellmann, {I. A.} and {Mendizabal Morentin}, M. and J. Metwally and Meyer, {A. B.} and M. Meyer and J. Mnich and O. Bouhali",
note = "Publisher Copyright: {\textcopyright} 2021, The Author(s).",
year = "2021",
month = dec,
doi = "10.1007/JHEP12(2021)083",
language = "English",
volume = "2021",
journal = "Journal of High Energy Physics",
issn = "1029-8479",
publisher = "Springer Verlag",
number = "12",
}