PoS - Proceedings of Science
Volume 283 - Neutrino Oscillation Workshop (NOW2016) - Session IV: Neutrino masses, states, interactions
Global bounds on heavy neutrino mixing
J. Lopez Pavon
Full text: pdf
Pre-published on: March 27, 2017
Published on: June 20, 2017
General bounds on the mixing between heavy and active neutrinos from a complete set of 28 observables are derived. Two scenarios are analysed and compared: (i) a general scenario in which an arbitrary number of heavy neutrinos is integrated out without any further assumption; (ii) only three heavy neutrinos are included and the light neutrino masses and mixings as measured in neutrino oscillations experiments are generated. A $1 -2$ $\sigma$ preference for non-zero heavy mixing is founded and implies some interesting correlations in the more constrained scenario (ii). At the $2\sigma$ level, the bounds on all the squared mixings are extremely similar in both scenarios. If only Lepton Flavour Conserving processes are included, they range from $\mathcal{O}(10^{-2})$ to $\mathcal{O}(10^{-4})$. Adding Lepton Flavor Violating observables as $\mu\rightarrow e\gamma$ to the analysis improves the bound in the $\mu-e$ sector by one order of magnitude.
DOI: https://doi.org/10.22323/1.283.0069
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.