Search for CP Violation at a Neutrino Factory in a Four-Neutrino Model

Details Search for CP Violation at a Neutrino Factory in a Four-Neutrino Model Search for CP Violation at a Neutrino Factory in a Four-Neutrino Model

1999-09-09

arxiv.org/abs/hep-ph/9909301v2

Phys.Lett.B469:179-187,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, latex, no figures, minor corrections

Scientific paper

10.1016/S0370-2693(99)01252-6

The CP violation effects in long baseline neutrino oscillations are studied in the framework of a four-neutrino model (three active neutrinos and one sterile neutrino). It is assumed that neutrino masses are devided into two nearly degenerate pairs, as indicated by the oscillation data. Approximative analytic expressions are derived for the probability differences $\Delta P_{\a\b} \equiv P(\nu_\alpha \to \nu_\beta)- P(\bar\nu_\alpha \to \bar\nu_\beta)$ taking into account the CP violation effect of the Earth's crust. The matter effect is found to be small compared with the genuine CP violation term, in contrast with the three-neutrino model.

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