Probing Majorana Neutrinos and their CP Violation in Decays of Charged Scalar Mesons π, K, D, Ds, B, Bc

Symmetry

Gorazd Cvetič²  Claudio O. Dib²  Choong Sun Kim¹  Jilberto Zamora-Saá² 

[1] Department of Physics and IPAP, Yonsei University, Seoul 120-749, Korea;Department of Physics, Universidad Técnica Federico Santa María (UTFSM), Casilla 110-V, Valparaíso, Chile

关键词: Majorana neutrino;    CP violation;    lepton number violating meson decays;   

DOI  :  10.3390/sym7020726

来源: mdpi

【 摘 要 】

Some of the outstanding questions of particle physics today concern the neutrino sector, in particular whether there are more neutrinos than those already known and whether they are Dirac or Majorana particles. There are different ways to explore these issues. In this article we describe neutrino-mediated decays of charged pseudoscalar mesons such as π^±, K^± and B^±, in scenarios where extra neutrinos are heavy and can be on their mass shell. We discuss semileptonic and leptonic decays of such kinds. We investigate possible ways of using these decays in order to distinguish between the Dirac and Majorana character of neutrinos. Further, we argue that there are significant possibilities of detecting CP violation in such decays when there are at least two almost degenerate Majorana neutrinos involved. This latter type of scenario fits well into the known neutrino minimal standard model (νMSM) which could simultaneously explain the Dark Matter and Baryon Asymmetry of the Universe.

【 授权许可】

CC BY   
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