GeV Majorana Neutrinos in Top-quark Decay at the LHC

Abstract

We explore the ΔL=2 same-sign dilepton signal from top-quark decay via a Majorana neutrino at the LHC in the top anti-top pair production samples. The signature is same-sign dilepton plus multi-jets with no significant missing energy. The most optimistic region lies where the Majorana neutrino mass is between 15-65 GeV. For 300 fb^-1 integrated luminosity, it is possible to probe S_{ij}, the effective mixing parameter, to order of 10^-5.

15 pages, 8 figures

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• Testing the Realistic Seesaw Model with Two Heavy Majorana Neutrinos at the CERN Large Hadron Collider
• A quantitative study on helicity inversion in Majorana neutrino decays at the LHC
• Top quark as a probe of heavy Majorana neutrino at the LHC and future collider
• Search for Majorana Neutrino Signal in $B_c$ Meson Rare Decay
• Double seesaw mechanism in a left-right symmetric model with TeV neutrinos
• Heavy Majorana Neutrino Production at Future $ep$ Colliders
• Lepton pair emission in the top quark decay $t\to b{W}^{+}{\ell }^{-}{\ell }^{+}$
• Search for heavy Majorana neutrinos at future lepton colliders
• Measuring CP violation in rare $W$ decays at the LHC
• Kinematical Observables in Semi-Invisible Decays