Option of three pseudo-Dirac neutrinos

As an alternative for popular see-saw mechanism, the option of three pseudo -Dirac neutrinos is discussed, where 1/2 (m((L)) +m((R))) much less than m( (D)) for their Majorana and Dirac masses. The actual neutrino mass matrix i s assumed in the form of tensor product M-(v) x ( (lambda(L))(1) (1)(lambda (R))), where M-(v) is a neutrino family mass matrix (M-(V)t = M-(v)) and la mbda((L,R)) = m((L,R))/m((D)) with m((L)), m((R)) and m((D)) being taken as universal for three neutrino families. It is shown that three neutrino eff ects (deficits of solar v(e)'s and atmospheric v(mu)'s as well as the possi ble LSND excess of v(e)'s in accelerator v(mu) beam) can be nicely describe d by the corresponding neutrino oscillations, though the LSND effect may, a lternatively, be eliminated (by a parameter choice). Atmospheric v(mu)'s os cillate dominantly into v(tau)'s, while solar v(e)'s - into (existing here automatically) Majorana sterile counterparts of v(e)'s. A phenomenological texture for neutrinos, compatible with the proposed description, is briefly presented.