منابع مشابه
Infra-red fixed points in supersymmetry
The Standard Model (SM) is a great success in describing the strong and electroweak interactions based on an underlying gauge principle, but one of its main weaknesses is that the masses of the matter particles, the quarks and leptons, are free parameters of the theory. This weakness persists in the Minimal Supersymmetric Standard Model (MSSM). The fermions mass problem in the MSSM arises from ...
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Gauged supergravities (in four and five dimensions) with eight supercharges and with vector supermultiplets have a unique ultra-violet (UV) fixed point on a given physical domain M of the space of the scalar fields. We show that in these models the infra-red (IR) fixed points are located on the boundary of M, where the space-time metric becomes singular. e-mail: [email protected] e-mai...
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We investigate the infra-red stability of the fixed points in the evolution of the Yukawa couplings, A-parameters and soft scalar masses in a broad class of supersymmetric theories. We show that the issue of stability is essentially determined in all three cases by the eigenvalues of the same matrix. In a very wide range of physically interesting theories it follows that, in the asymptotically ...
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We consider a scenario in which the minimal supersymmetric standard model (MSSM) is valid up to an energy scale of ∼ 10 16 GeV, but that above this scale the theory is supplemented by extra vector-like representations of the gauge group, plus a gauged U(1) X family symmetry. In our approach the extra heavy matter above the scale ∼ 10 16 GeV is used in two different ways: (1) to allow (two-loop)...
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We provide the solutions of the fixed point conditions of the Yukawa sector for a large class of N = 1 supersymmetric theories including the minimal and next-to-minimal supersymmetric standard models and their grand unified and other extensions. We also introduce a test which can discriminate between infra-red stable, infra-red unstable and saddle point solutions, and illustrate our methods wit...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1995
ISSN: 0370-2693
DOI: 10.1016/0370-2693(95)00099-7