Flavor changing neutrino interactions and CP violation in neutrino oscillations

Details Flavor changing neutrino interactions and CP violation in neutrino oscillations Flavor changing neutrino interactions and CP violation in neutrino oscillations

2002-10-09

arxiv.org/abs/hep-ph/0210138v7

Prog.Theor.Phys.114:439-449,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages in LaTeX2e, 12 ps figures. The discussion of detectability of the CP violation is deleted

Scientific paper

10.1143/PTP.114.439

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 \nu_\mu -\nu_\tau sector and the \nu_e -\nu_\mu sector in order to study their effects in \nu_\mu\to\nu_\tau and \nu_\mu\to\nu_e oscillations, respectively. The FCNI effect proves to possibly dominate the CP violating effect and significantly survive as a fake CP violating effct in the neutrino energy region where the pure CP violating effect, ordinary matter effect and FDNI effect fall, for example, above 4 GeV at the baseline of L=730 km in the \nu_\mu\to\nu_\tau oscillation for the maximum parameter values of FCNI and FDNI allowed by the atmospheric neutrino oscillation data. The FCNI and FDNI effects on CP violation in the $\nu_\mu\to\nu_e$ oscillation are negligibly small due to the stringent constraints on FCNI from the bounds on lepton flavor violating processes and on FDNI from the limits on lepton universality violation.

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