GeV Majorana Neutrinos in Top-quark Decay at the LHC
Zongguo Si, Kai Wang
TL;DR
This paper investigates the potential to detect GeV-scale Majorana neutrinos through same-sign dilepton signals in top-quark decays at the LHC, focusing on specific mass ranges and mixing parameters.
Contribution
It proposes a novel search strategy for GeV Majorana neutrinos in top decays at the LHC, analyzing the sensitivity to effective mixing parameters.
Findings
Potential to probe mixing parameter S_{ij} down to 10^-5 with 300 fb^-1 luminosity.
Identifies the optimal neutrino mass range of 15-65 GeV for detection.
Describes a distinctive same-sign dilepton plus multi-jet signature without missing energy.
Abstract
We explore the \Delta L=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.
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