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Abstract: A search is performed for the rare decay W±??±?in proton-proton collisions at ?s=13 TeV. Data corresponding to an integrated luminosity of 137fb?1were collected during 2016 to 2018 with the CMS detector. This analysis exploits a novel search strategy based on Wboson production in top quark pair events. An inclusive search for the W±??±?decay is not optimal at the LHC because of the high trigger thresholds. Instead, a trigger selection is exploited in which the Wboson originating from one of the top quarks is used to tag the event in a leptonic decay. The Wboson emerging from the other top quark is used to search for the W±??±?signature. Such decays are characterized by an isolated track pointing to a large energy deposit, and by an isolated photon of large transverse momentum. The presence of bquark jets reduces the background from the hadronization of light-flavor quarks and gluons. The W±??±?decay is not observed. An upper exclusion limit is set to this branching fraction, corresponding to 1.50 ×10?5at 95%confidence level, whereas the expected upper exclusion limit is 0.85+0.52?0.29×10?5.
Fuente: Physics Letters B Volume 819 (2021), 136409
Publisher: Elsevier
Publication date: 10/08/2021
No. of pages: 24
Publication type: Article
DOI: 10.1016/j.physletb.2021.136409
ISSN: 0370-2693,1873-2445
Publication Url: https://doi.org/10.1016/j.physletb.2021.136409
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UCrea Repository Read publication
SIRUNYAN, A.M.
JAVIER ANDRES BROCHERO CIFUENTES
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
BARBARA CHAZIN QUERO
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
PEDRO JOSE FERNANDEZ MANTECA
GERVASIO GOMEZ GRAMUGLIO
CELSO MARTINEZ RIVERO
PABLO MARTINEZ RUIZ DEL ARBOL
FRANCISCO MATORRAS WEINIG
JONATAN PIEDRA GOMEZ
CEDRIC GERALD PRIEELS
FRANCESCA SHUN-NING ANNAROSA RICCI-TAM
MARIA TERESA RODRIGO ANORO
ALBERTO RUIZ JIMENO
LUCA SCODELLARO
IVAN VILA ALVAREZ
JESUS MANUEL VIZAN GARCIA
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