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, N-l, 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 Lambda. For the case mNl=Lambda, the existence of Ne(Nmu) is excluded for masses up to 4.60 (4.70) TeV at 95% confidence level.

Sirunyan, A.M., 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

Battilana, C.;Bonacorsi, D.;Braibant-Giacomelli, S.;Brigliadori, L.;Campanini, R.;Capiluppi, P.;Castro, A.;Chhibra, S. S.;Codispoti, G.;Cuffiani, M.;Fanfani, A.;Fasanella, D.;Guiducci, L.;Navarria, F. L.;Rossi, A. M.;Rovelli, T.;Siroli, G. P.;Tosi, N.;
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, N-l, 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 Lambda. For the case mNl=Lambda, the existence of Ne(Nmu) is excluded for masses up to 4.60 (4.70) TeV at 95% confidence level.
2017
Sirunyan, A.M., 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].
Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/619807
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