2014/05/31 by Roshni Bose, Amitava Datta, Anirban Kundu +2
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Electron #Lambda #Large Hadron Collider #Lepton #Lepton number #Minimal Supersymmetric Standard Model #Muon #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum mechanics #R-parity #Supersymmetry #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.90.035007
published as Phys. Rev. D 90, 035007 (2014) · 16 pages, 4 embedded eps figures. v2: Minor modifications, discussions on neutrino mass matrix and backgrounds added. All results unchanged. Version to appear in Phys. Rev. D
arxiv created 2014/07/24 · openalex publication_date 2014/08/08 · arxiv updated 2014/08/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We consider a model of neutrino mass based on R-parity-violating supersymmetry, with three \ensuremathμi, relevant for bilinear R-parity-violating terms, and three \ensuremathλijk^\ensuremath', relevant for the trilinear terms. The present neutrino data, after a precise determination of the mixing angle \ensuremathθ13, severely constrain such models. We make a thorough study of one such class of models that may have interesting signatures at the upgraded LHC. In this class of models, the relevant trilinear couplings are of the form \ensuremathλi33^\ensuremath', so if the lighter stop squark \stackrel\texttildelowt1 is the lightest supersymmetric particle, it will decay only through these couplings, giving rise to events with isolated hard leptons and jets. Even when \stackrel\texttildelowt1 is the next-to-lightest supersymmetric particle, it can decay via the tiny \ensuremathλ^\ensuremath' couplings allowed by the neutrino data, although it may face stiff competition from some R-parity-conserving decay modes. Using a simple Pythia based simulation, we find that in both the cases the signal consisting of a pair of oppositely charged leptons (ee, \ensuremathμ\ensuremathμ or e\ensuremathμ) plus jets may be observable at the upgraded LHC experiments for a reasonable range of the \stackrel\texttildelowt1 mass.