A search for physics beyond the standard model in the final state with two same-flavour leptons (electrons or muons) and two quarks produced in proton–proton collisions at s=13TeV is presented. The data were recorded by the CMS experiment at the CERN LHC and correspond to an integrated luminosity of 2.3fb−1. The observed data are in good agreement with the standard model background prediction. The results of the measurement are interpreted in the framework of a recently proposed model in which a heavy Majorana neutrino, Nℓ, stems from a composite-fermion scenario. Exclusion limits are set for the first time on the mass of the heavy composite Majorana neutrino, mNℓ, and the compositeness scale Λ. For the case mNℓ=Λ, the existence of Ne(Nμ) is excluded for masses up to 4.60 (4.70) TeV at 95% confidence level.

Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2017). Search for a heavy composite Majorana neutrino in the final state with two leptons and two quarks at s=13TeV. PHYSICS LETTERS. SECTION B, 775, 315-337 [10.1016/j.physletb.2017.11.001].

Search for a heavy composite Majorana neutrino in the final state with two leptons and two quarks at s=13TeV

Brianza, L.;Brivio, F.;Ciriolo, V.;Dinardo, M. E.;Fiorendi, S.;Ghezzi, A.;Govoni, P.;Malberti, M.;Manzoni, R. A.;Paganoni, M.;Pauwels, K.;Pigazzini, S.;Ragazzi, S.;Tabarelli de Fatis, T.;Lucchini, M. T.;Massironi, A.;De Guio, F.;
2017

Abstract

A search for physics beyond the standard model in the final state with two same-flavour leptons (electrons or muons) and two quarks produced in proton–proton collisions at s=13TeV is presented. The data were recorded by the CMS experiment at the CERN LHC and correspond to an integrated luminosity of 2.3fb−1. The observed data are in good agreement with the standard model background prediction. The results of the measurement are interpreted in the framework of a recently proposed model in which a heavy Majorana neutrino, Nℓ, stems from a composite-fermion scenario. Exclusion limits are set for the first time on the mass of the heavy composite Majorana neutrino, mNℓ, and the compositeness scale Λ. For the case mNℓ=Λ, the existence of Ne(Nμ) is excluded for masses up to 4.60 (4.70) TeV at 95% confidence level.
Articolo in rivista - Articolo scientifico
CMS; Exotica; Nuclear and High Energy Physics
English
2017
775
315
337
none
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2017). Search for a heavy composite Majorana neutrino in the final state with two leptons and two quarks at s=13TeV. PHYSICS LETTERS. SECTION B, 775, 315-337 [10.1016/j.physletb.2017.11.001].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/187538
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