2006/03/31 by Minako Honda, Honda, Minako, Naotoshi Okamura +3 · 1 citation
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0603268
47 pages REVTeX4, 16 eps figures
arxiv created 2006/03/31 · openalex publication_date 2006/03/31 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
The violation of lepton-flavor-universality in the neutrino-Z interactions can lead to extra matter effects on neutrino oscillations at high energies, beyond that due to the usual charged-current interaction of the electron-neutrino. We show that the dominant effect of the violation is a shift in the effective value of θ23. This is in contrast to the dominant effect of the charged-current interaction which shifts θ12 and θ13. The shift in θ23 will be difficult to observe if the value of sin2(2θ23) is too close to one. However, if the value of sin2(2θ23) is as small as 0.92, then a Fermilab -> Hyper-Kamiokande experiment can potentially place a constraint on universality violation at the 1% level after 5 years of data taking.