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=13 TeV is presented. The data were recorded by the CMS experiment at the CERN LHC and correspond to an integrated luminosity of 2.3 fb−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, stems from a composite-fermion scenario. Exclusion limits are set for the first time on the mass of the heavy composite Majorana neutrino, mN, and the compositeness scale . For the case mN=, the existence of Ne(Nμ) is excluded for masses up to 4.60 (4.70) TeV at 95% confidence level.

Search for a heavy composite Majorana neutrino in the final state with two leptons and two quarks at s=13TeV / Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Erö, J., Flechl, M., Friedl, M., Frühwirth, R., Ghete, V.M., Grossmann, J., Hörmann, N., Hrubec, J., Jeitler, M., König, A., Krätschmer, I., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 775:(2017), pp. 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

Barone, L.;Cipriani, M.;Del Re, D.;Longo, E.;Marzocchi, B.;Organtini, G.;Paramatti, R.;Rahatlou, S.;Santanastasio, 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=13 TeV is presented. The data were recorded by the CMS experiment at the CERN LHC and correspond to an integrated luminosity of 2.3 fb−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, stems from a composite-fermion scenario. Exclusion limits are set for the first time on the mass of the heavy composite Majorana neutrino, mN, and the compositeness scale . For the case mN=, the existence of Ne(Nμ) is excluded for masses up to 4.60 (4.70) TeV at 95% confidence level.
2017
CMS; Exotica; Nuclear and High Energy Physics
01 Pubblicazione su rivista::01a Articolo in rivista
Search for a heavy composite Majorana neutrino in the final state with two leptons and two quarks at s=13TeV / Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Erö, J., Flechl, M., Friedl, M., Frühwirth, R., Ghete, V.M., Grossmann, J., Hörmann, N., Hrubec, J., Jeitler, M., König, A., Krätschmer, I., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 775:(2017), pp. 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/11573/1095817
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