Han Yuan, Tianhong Wang, Guo-Li Wang, Wan-Li Ju, Jin-Mei Zhang
Neutrinoless hadron Lepton Number Violating (LNV) decays can be induced by virtual Majorana neutrino, which in turn indubitably show the Majorana nature of neutrinos. Many three-body LNV processes and Lepton Flavour Violating (LFV) processes have been studied extensively in theory and experiment. In this current paper, as a supplement, we study 75 four-body LNV (LFV) processes from heavy pseudoscalar $B$ and $D$ decays. Most of these processes have not been studied in theory and searched for in experiment, while they may have sizable decay rates. Because the four-body decay modes have the same vertexes and mixing parameters with three-body cases, so their branching fraction are comparable with the corresponding three-body decays. Further, because of the broad phase space, we can detect Majorana neutrino mass in much wider range through four-body meson decays than through the corresponding three-body decays. We calculate their decay widths and branching fractions with current bounds on heavy Majorana neutrino mixing parameters and hoped these four-body decay processes could be probed in experiment.
View original:
http://arxiv.org/abs/1304.3810
No comments:
Post a Comment