Journal
SYMMETRY-BASEL
Volume 7, Issue 2, Pages 726-773Publisher
MDPI
DOI: 10.3390/sym7020726
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Funding
- FONDECYT, Chile [1130599, 1130617]
- NRF grant - Korean government of the MEST [2011-0017430, 2011-0020333]
- [PIIC 2014]
- [Mecesup FSM1204]
- National Research Foundation of Korea [2011-0017430, 21A20131100006] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 pi(+/-), 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 (nu MSM) which could simultaneously explain the Dark Matter and Baryon Asymmetry of the Universe.
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