Search for the Z boson decay to ttmm in proton-proton collisions at Vs = 13 TeV

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URI: https://hdl.handle.net/10902/36091
ISSN: 0031-9007
ISSN: 1079-7114
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Autoría
Hayrapetyan, A.; Bhowmik, Sandeep; Blanco Fernández, SergioAutoridad Unican; Brochero Cifuentes, Javier AndrésAutoridad Unican; Cabrillo Bartolomé, José IbánAutoridad Unican; Calderón Tazón, AliciaAutoridad Unican; Duarte Campderros, JorgeAutoridad Unican; Fernández García, MarcosAutoridad Unican; Gómez Gramuglio, GervasioAutoridad Unican; Lasaosa García, Clara; López Ruiz, Rubén; Martínez Rivero, Celso; Martínez Ruiz del Árbol, PabloAutoridad Unican; Matorras Weinig, FranciscoAutoridad Unican; Matorras Cuevas, PabloAutoridad Unican; Navarrete Ramos, Efrén; Piedra Gómez, JonatanAutoridad Unican; Scodellaro, LucaAutoridad Unican; Vila Álvarez, IvánAutoridad Unican; [et al.]
Fecha
2024-10-18
Derechos
© 2024 CERN, for the CMS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Funded by SCOAP3.
Publicado en
Physical Review Letters, 2024, 133(16), 161805
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American Physical Society
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Resumen/Abstract
The first search for the Z boson decay to ttmm at the CERN LHC is presented, based on data collected by the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 138 fb -1 The data are compatible with the predicted background. For the first time, an upper limit at the 95% confidence level of 6.9 times the standard model expectation is placed on the ratio of the Z --> ttmm to Z --> 4m branching fractions. Limits are also placed on the six flavor-conserving four-lepton effective-field-theory operators involving two muons and two tau leptons, for the first time testing all such operators.
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© 2024 CERN, for the CMS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Funded by SCOAP3.Excepto si se señala otra cosa, la licencia del ítem se describe como © 2024 CERN, for the CMS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Funded by SCOAP3.