The experimental observation of lepton-number violating processes would unambiguously indicate the Majorana nature of neutrinos. Various ΔL = 2 processes for pseudoscalar meson M1 decays to another pseudoscalar meson M2 and two charged leptons ℓ1, ℓ2 (M1+→ℓ1+ℓ2+M2−) have been studied extensively. Extending the existing literature on the studies of these kinds of processes, we consider the rare decays of heavy mesons to a vector meson or a pseudoscalar meson. These processes have not been searched for experimentally, while they may have sizable decay rates. We calculate their branching fractions and propose to search for these decay modes in the current and forthcoming experiments, in particular at the LHCb.
@article{arxiv.1003.5570,
title = {Lepton-Number Violating Decays of Heavy Mesons},
author = {Jin-Mei Zhang and Guo-Li Wang},
journal= {arXiv preprint arXiv:1003.5570},
year = {2011}
}