Implications of the Superkamiokande result on the nature of new physics

Details Implications of the Superkamiokande result on the nature of new physics Implications of the Superkamiokande result on the nature of new physics

1998-07-09

arxiv.org/abs/hep-ph/9807315v1

Nucl.Phys.Proc.Suppl. 77 (1999) 299-307

Physics

High Energy Physics

High Energy Physics - Phenomenology

Based on the talk presented at the Neutrino-98 Conference, Takayama, Japan, June 4-9, 1998

Scientific paper

10.1016/S0920-5632(99)00432-6

It is remarked that the SuperKamiokande (SK) discovery of $\nu_\mu$ to $\nu_\tau$ (or $\nu_X$)-oscillation, with a $\delta m^2 \approx 10^{-2}-10^{-3} eV^2$ and $sin^2 2 \theta > 0.8$, provides a clear need for the right-handed (RH) neutrinos. This in turn reinforces the ideas of the left-right symmetric gauge structure $SU(2)_L \times SU(2)_R$ as well as SU(4)-color, for which the RH neutrinos are a compelling feature. It is noted that by assuming (a) that B-L and $I_{3R}$, contained in a string-derived $G(224) = SU(2)_L \times SU(2)_R \times SU(4)^c$ or SO(10), break near the GUT-scale, as opposed to an intermediate scale, (b) the see-saw mechanism, and (c) the SU(4)-color relation between the Dirac mass of the tau neutrino and $m_{top}$, one obtains a mass for $\nu^\tau_L$ which is just about what is observed. This is assuming that the SK group is actually seeing $\nu^\mu_L - \nu^\tau_L$ (rather than $\nu_L^\mu - \nu_X$) oscillation. Following a very recent work by Babu, Wilczek and myself, it is furthermore noted that one can quite plausibly obtain a large $\nu_L^\mu-\nu_L^\tau$ oscillation angle, as observed, in spite of highly non-degenerate masses of the light neutrinos: e.g. with $m(\nu_L^\mu)/m(\nu_L^\tau)\approx 1/10-1/20$. Such non-degeneracy is of course natural to see-saw. In this case, $\nu^e_L - \nu^\mu_L$ oscillation can be relevant to the small angle MSW explanation of the solar neutrino puzzle. Implications of the mass of $\nu^\tau_L$ suggested by the SK result, on proton decay are noted. Comments are made at the end on how the SuperKamiokande result supplements the LEP result in selecting out the route to higher unification.

Affiliated with

Also associated with

No associations

Rating

Implications of the Superkamiokande result on the nature of new physics does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Implications of the Superkamiokande result on the nature of new physics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Implications of the Superkamiokande result on the nature of new physics will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-297382