Unveiling the Heavy Neutrino Nature at LHCb

TL;DR

This paper investigates how Bc meson decays at LHCb can reveal whether heavy neutrinos are Dirac or Majorana particles by analyzing specific decay signatures and tau lepton energy spectra.

Contribution

It introduces a novel method to determine the nature of heavy neutrinos through Bc meson decay analysis at LHCb, focusing on tau lepton energy spectrum measurements.

Findings

Potential observation of heavy neutrino signatures in HL-LHCb data

Tau lepton energy spectrum can distinguish neutrino nature

Decay process offers a new probe for neutrino properties

Abstract

In this work, we study the lepton number violating Bc meson decays via one intermediate on-shell heavy neutrino. The specific studied process is $B_{c}^{+} \to \mu^{+} \ N \to \mu^{+} \mu^{+} \tau^{-} \nu$ which could allow distinguishing the nature of the heavy neutrino nature (Dirac or Majorana) by studying the tau lepton energy spectrum in the LHCb experiment. The result suggests that this signature could be observed in the collected data during the HL-LHCb lifetime.