Sm. Bilenky et al., BOUNDS ON LONG-BASE-LINE (NU)OVER-BAR(E)-](NU)OVER-BAR(E) AND ((NU)OVER-BAR)(MU)-]((NU)OVER-BAR)(E) TRANSITION PROBABILITIES, Physical review. D. Particles and fields, 57(3), 1998, pp. 1920-1933
We discuss long-baseline neutrino oscillations in the framework of the
two 4-neutrino schemes which can accommodate all existing neutrino os
cillation data. Negative results of short-baseline reactor and acceler
ator experiments allow us to obtain rather strong bounds on the long-b
aseline <(nu)over bar>(e) --> <(nu)over bar>(e) and <((nu))over bar>(m
u) --> <((nu))over bar>(e) transition probabilities. We consider in de
tail matter effects and show that the vacuum bounds are not substantia
lly modified. We also comment on corresponding bounds in 3-neutrino sc
enarios.