The conjecture that among three massive neutrinos ν1 , ν2 , ν3 there is no direct mixing between ν1 and ν3 leads to a two–mixing texture for three active neutrinos νe , νμ , ντ . This texture, much discussed previously, is neatly consistent with the observed deficits of solar νe’s and atmospheric νμ’s, but (without extra mixing with at least one sterile neutrino νs) predicts no LSND effect for ...
