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

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

Autoría

HAYRAPETYAN, A.

SANDEEP BHOWMIK

SERGIO BLANCO FERNANDEZ

JAVIER ANDRES BROCHERO CIFUENTES

MARCOS FERNANDEZ GARCIA

CLARA LASAOSA GARCIA

PABLO MATORRAS CUEVAS

EFREN NAVARRETE RAMOS