Heavy neutrinos and the $pp\to lljj$ CMS data

Abstract

We show that the excess in the $pp\to eejj$ CMS data can be naturally interpreted within the Minimal Left Right Symmetric model (MLRSM), keeping $g_L=g_R$, if CP phases and non-degenerate masses of heavy neutrinos are taken into account. As an additional benefit, a natural interpretation of the reported ratio (14:1) of the opposite-sign (OS) $pp\to l^{\pm }{l}^{\mp }jj$ to the same-sign (SS) $pp\to l^{\pm }{l}^{\pm }jj$ lepton signals is possible. Finally, a suppression of muon pairs with respect to electron pairs in the $pp\to lljj$ data is obtained, in accordance with experimental data. If the excess in the CMS data survives in the future, it would be a first clear hint towards presence of heavy neutrinos in right-handed charged currents with specific CP phases, mixing angles and masses, which will have far reaching consequences for particle physics directions.

8 pages, 7 figures. v2: minor changes, refs added, typos corrected, version accepted for publication in PLB

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• Production of heavy sterile neutrinos from vector boson decay at electroweak temperatures
• Relaxing LHC constraints on the $W_R$ mass
• Heavy Neutrino-Antineutrino Oscillations in Quantum Field Theory
• Neutrinoless double beta decay in Left-Right symmetric model with double seesaw mechanism
• Low scale left-right-right-left symmetry
• Neutrino Mass and Neutrinoless double beta decay in SO(10) GUT with Pati-Salam symmetry