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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.
Fuente: Physical Review Letters, 2024, 133(16), 161805
Editorial: American Physical Society
Fecha de publicación: 18/10/2024
Nº de páginas: 20
Tipo de publicación: Artículo de Revista
DOI: 10.1103/PhysRevLett.133.161805
ISSN: 0031-9007,1079-7114
Url de la publicación: https://doi.org/10.1103/PhysRevLett.133.161805
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Repositorio UCrea Leer publicación
HAYRAPETYAN, A.
SANDEEP BHOWMIK
SERGIO BLANCO FERNANDEZ
JAVIER ANDRES BROCHERO CIFUENTES
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
GERVASIO GOMEZ GRAMUGLIO
CLARA LASAOSA GARCIA
RUBEN LOPEZ RUIZ
CELSO MARTINEZ RIVERO
PABLO MARTINEZ RUIZ DEL ARBOL
FRANCISCO MATORRAS WEINIG
PABLO MATORRAS CUEVAS
EFREN NAVARRETE RAMOS
JONATAN PIEDRA GOMEZ
LUCA SCODELLARO
IVAN VILA ALVAREZ
JESUS MANUEL VIZAN GARCIA
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