Precision tests of unitarity in leptonic mixing
Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Fakultät für Mathematik und Physik D-79104 Freiburg, Germany
Received: 25 October 2013
Accepted: 23 December 2013
In the light of the recent LHC data, we study precision tests sensitive to the violation of lepton universality, in particular the violation of unitarity in neutrino mixing. Keeping all data we find no satisfactory fit, even allowing for violations of unitarity in neutrino mixing. Leaving out from the hadronic forward-backward asymmetry at LEP, we find a good fit to the data with some evidence of lepton universality violation at the level.
PACS: 14.60.Pq – Neutrino mass and mixing / 14.60.St – Non-standard-model neutrinos, right-handed neutrinos, etc. / 13.15.+g – Neutrino interactions
© EPLA, 2013