CP violation in lepton number violating semihadronic decays of $K, D, D_s, B, B_c$
Abstract
We study the CP violation in lepton number violating meson decays , where and are pseudoscalar mesons, and , and the charged leptons are . It turns out that the CP-violating difference can become appreciable when two intermediate on-shell Majorana neutrinos () participate in these decays. Our calculations show that the asymmetry becomes largest when the masses of and are almost degenerate, i.e., when the mass difference becomes comparable with the (small) decay widths of these neutrinos: . We show that in such a case, the CP ratio becomes a quantity . The observation of CP violation in these decays would be consistent with the existence of the well-motivated MSM model with two almost degenerate heavy neutrinos in the mass range between - GeV.
Keywords
Cite
@article{arxiv.1403.2555,
title = {CP violation in lepton number violating semihadronic decays of $K, D, D_s, B, B_c$},
author = {Gorazd Cvetic and C. S. Kim and Jilberto Zamora-Saa},
journal= {arXiv preprint arXiv:1403.2555},
year = {2014}
}
Comments
19 pages, 8 figures; v2: a new Table (I); minor changes in the text; new references [5,31,32]; ref.[19] extended; to appear in Phys.Rev.D