Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1996-03-11
Physics
High Energy Physics
High Energy Physics - Theory
7 pages, Latex, talk prepared for the Second International Sakharov Conference on Physics, Moscow (May 1996)
Scientific paper
$SO(10)$ grand unified models have an intermediate symmetry group in between $SO(10)$ and $SU(3)_{C} \otimes SU(2)_{L} \otimes U(1)_{Y}$. Hence they lead to a prediction for proton lifetime in agreement with the experimental lower limit. This paper reviews the recent work on the tree-level potential and the one-loop effective potential for such models, with application to inflationary cosmology. The open problems are the use of the most general form of tree-level potential for $SO(10)$ models in the reheating stage of the early universe, and the analysis of non-local effects in the semiclassical field equations for such models in Friedmann-Robertson-Walker backgrounds.
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