| Issue |
EPL
Volume 88, Number 5, December 2009
|
|
|---|---|---|
| Article Number | 51001 | |
| Number of page(s) | 6 | |
| Section | The Physics of Elementary Particles and Fields | |
| DOI | https://doi.org/10.1209/0295-5075/88/51001 | |
| Published online | 09 December 2009 | |
Non-unitary lepton mixing matrix, leptogenesis and low-energy CP violation
Max-Planck-Institut für Kernphysik - Postfach 103980, D-69029 Heidelberg, Germany, EU
Corresponding author: werner.rodejohann@mpi-hd.mpg.de
Received:
17
July
2009
Accepted:
10
November
2009
It is well known that for unflavored leptogenesis there is in general no connection between low- and high-energy CP violation. We stress that for a non-unitary lepton mixing matrix this may not be the case. We give an illustrative example for this connection and show that the non-standard CP phases that are induced by non-unitarity can be responsible for observable effects in neutrino oscillation experiments as well as for the generation of the baryon asymmetry of the Universe. Lepton flavor violation in decays such as 
can also be induced at an observable level. We also comment on the neutrino mass limits from leptogenesis, which get barely modified in case of a non-unitary mixing matrix.
PACS: 14.60.Pq – Neutrino mass and mixing / 14.60.St – Non-standard-model neutrinos, right-handed neutrinos, etc.
© EPLA, 2009
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