Search for a heavy composite Majorana neutrino in events with dilepton signatures from proton-proton collisions at √s=13 Tev
Yükleniyor...
Dosyalar
Tarih
2023
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Results are presented of a search for a heavy Majorana neutrino N ? decaying into two same-flavor leptons ? (electrons or muons) and a quark-pair jet. A model is considered in which the N ? is an excited neutrino in a compositeness scenario. The analysis is performed using a sample of proton-proton collisions at & RADIC;s = 13 TeV recorded by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 138 fb-1. The data are found to be in agreement with the standard model prediction. For the process in which the N ? is produced in association with a lepton, followed by the decay of the N ? to a same-flavor lepton and a quark pair, an upper limit at 95% confidence level on the product of the cross section and branching fraction is obtained as a function of the N ? mass mN ? and the compositeness scale ?. For this model the data exclude the existence of Ne (N & mu;) for mN ? below 6.0 (6.1) TeV, at the limit where mN ? is equal to ?. For mN ? N 1 TeV, values of ? less than 20 (23) TeV are excluded. These results represent a considerable improvement in sensitivity, covering a larger parameter space than previous searches in pp collisions at 13 TeV.
Açıklama
Anahtar Kelimeler
CMS, LHC, Composite Fermions, Heavy Leptons
Kaynak
Physics Letters B
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
843