TY - JOUR
T1 - Probing effective field theory operators in the associated production of top quarks with a Z boson in multilepton final states at √s = 13 TeV
AU - The CMS collaboration
AU - Tonon, N.
AU - Aarup Petersen, H.
AU - Aldaya Martin, M.
AU - Asmuss, P.
AU - Baxter, S.
AU - Bayatmakou, M.
AU - Behnke, O.
AU - Bermúdez Martínez, A.
AU - Bhattacharya, S.
AU - Bin Anuar, A. A.
AU - Borras, K.
AU - Brunner, D.
AU - Campbell, A.
AU - Cardini, A.
AU - Cheng, C.
AU - Colombina, F.
AU - Consuegra Rodríguez, S.
AU - Correia Silva, G.
AU - Danilov, V.
AU - De Silva, M.
AU - Didukh, L.
AU - Eckerlin, G.
AU - Eckstein, D.
AU - Estevez Banos, L. I.
AU - Filatov, O.
AU - Gallo, E.
AU - Geiser, A.
AU - Giraldi, A.
AU - Grohsjean, A.
AU - Guthoff, M.
AU - Jafari, A.
AU - Jomhari, N. Z.
AU - Jung, H.
AU - Kasem, A.
AU - Kasemann, M.
AU - Kaveh, H.
AU - Kleinwort, C.
AU - Krücker, D.
AU - Lange, W.
AU - Lidrych, J.
AU - Lipka, K.
AU - Lohmann, W.
AU - Mankel, R.
AU - Melzer-Pellmann, I. A.
AU - Mendizabal Morentin, M.
AU - Metwally, J.
AU - Meyer, A. B.
AU - Meyer, M.
AU - Mnich, J.
AU - Moraes, A.
N1 - Publisher Copyright:
© 2021, The Author(s).
PY - 2021/12
Y1 - 2021/12
N2 - 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.]
AB - 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.]
KW - Hadron-Hadron scattering (experiments)
KW - Top physics
UR - http://www.scopus.com/inward/record.url?scp=85122912032&partnerID=8YFLogxK
U2 - 10.1007/JHEP12(2021)083
DO - 10.1007/JHEP12(2021)083
M3 - Article
AN - SCOPUS:85122912032
SN - 1029-8479
VL - 2021
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 12
M1 - 83
ER -