Precision tests of unitarity in leptonic mixing

• Published in: Europhysics letters Vol. 105; no. 1; pp. 11001 - 11005
• Main Authors: Basso, L., Fischer, O., van der Bij, J. J.
• Format: Journal Article
• Language: English
• Published: Les Ulis EDP Sciences, IOP Publishing and Società Italiana di Fisica 01-01-2014; IOP Publishing
• Subjects: 13.15.+g; 14.60.Pq; 14.60.St; Leptons; Neutrinos
• ISSN: 0295-5075; 1286-4854
• DOI: 10.1209/0295-5075/105/11001

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.