BACK TO THE DOUBLET TRIPLET SPLITTING PROBLEM

被引:63
作者
BARBIERI, R
DVALI, G
MORETTI, M
机构
[1] UNIV PISA,DEPT PHYS,I-56100 PISA,ITALY
[2] ICTP,TRIESTE,ITALY
[3] INFN,PISA,ITALY
[4] SISSA,TRIESTE,ITALY
[5] INFN,FERRARA,ITALY
[6] INFN,TRIESTE,ITALY
关键词
D O I
10.1016/0370-2693(93)90501-8
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Examples of supersymmetric grand unified models are explicitly illustrated, in which the Higgs doublets are identified, at the tree level, with the massless degrees of freedom describing an ''accidental'' degeneracy of the vacuum at the first stage of gauge symmetry breaking. This degeneracy occurs as a consequence either of the gauge symmetry or of a discrete exact symmetry. The effect of radiative corrections, which lift the vacuum degeneracy and break the SU (2) x U (1) group. is discussed, showing that the consistency of the theory, at low energy, only sets a rather weak and m(t)-dependent lower bound on the lightest Higgs mass, with no constraint on the top-quark itself.
引用
收藏
页码:137 / 142
页数:6
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