On the Interpretation of the Atmospheric Neutrino Data in Terms of Flavor Changing Neutrino Interactions
نویسندگان
چکیده
Flavour changing (FC) neutrino–matter interactions have been proposed as a solution to the atmospheric neutrino anomaly. Here we perform the analysis of the full set of the recent 52 kTy Super-Kamiokande atmospheric neutrino data, including the zenith angle distribution of the contained events as well as the higher energy upward–going stopping and through-going muon events. Our results show that the FC mechanism can describe the full data sample with a χ2min = 44/33 d.o.f which is acceptable at the 90 % confidence level. The combined analysis confines the amount of FC to be either close to maximal or to the level of about (10–50)%. Typeset using REVTEX
منابع مشابه
ar X iv : h ep - p h / 00 09 09 2 v 1 7 S ep 2 00 0 1 Status of the solutions to neutrino
We review the status of the solutions to neutrino anomalies by flavor-changing as well as flavor-diagonal neutrino interactions. While it is difficult to explain the atmospheric neutrino data the solar neutrino data can be well accounted for by the massless neutrino oscillation induced by such non-standard neutrino interactions. We also discuss the possibility to test such kind of interactions ...
متن کاملFlavor changing neutrino interactions and CP violation in neutrino oscillations
We investigate the interference effects of non-standard neutrino matter interactions (NSNI) with the mass-induced neutrino oscillations. The NSNI is composed of flavor-changing neutrino interactions (FCNI) and flavor-diagonal neutrino interactions (FDNI). Both of the interactions are introduced in the νμ − ντ sector and the νe−νμ sector in order to study their effects in νμ → ντ and νμ → νe osc...
متن کاملStandard and Non-Standard Physics in Neutrino Oscillations
We analyze the impact of recent solar and atmospheric data in the determination of the neutrino oscillation parameters, taking into account that both the solar νe and the atmospheric νμ may convert to a mixture of active and sterile neutrinos. Furthermore, in the context of the atmospheric neutrino problem we discuss an extended mechanism of neutrino propagation which combines both oscillations...
متن کاملMSW effect with flavor changing interactions and the atmospheric neutrino problem
We consider flavor changing effective neutrino interactions in the context of massive neutrinos in the issue of atmospheric neutrinos. Assuming as usual that this is an indication of the oscillation of muon neutrinos into tau neutrinos we show that there is a set of parameters which is consistent with the MSW resonance condition for the typical Earth density and atmospheric neutrino energies. I...
متن کاملCan lepton flavor violating interactions explain the LSND results ?
If the atmospheric and the solar neutrino problem are both explained by neutrino oscillations, and if there are only three light neutrinos, then all masssquared differences between the neutrinos are known. In such a case, existing terrestrial neutrino oscillation experiments cannot be significantly affected by neutrino oscillations, but, in principle there could be an anomaly in the neutrino fl...
متن کامل