Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-12-03
Phys.Scripta T121 (2005) 185-191
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 5 figures; Invited talk at the Nobel Symposium 129 on Neutrinos at Haga Slott, Sweden, August, 2004
Scientific paper
10.1088/0031-8949/2005/T121/029
Seesaw mechanism appears to be the simplest and most appealing way to understand small neutrino masses observed in recent experiments. It introduces three right handed neutrinos with heavy masses to the standard model, with at least one mass required by data to be close to the scale of conventional grand unified theories. This may be a hint that the new physics scale implied by neutrino masses and grand unification of forces are one and the same. Taking this point of view seriously, I explore different ways to resolve the puzzle of large neutrino mixings in grand unified theories such as SO(10) and models based on its subgroup $SU(2)_L\times SU(2)_R\times SU(4)_c$.
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