SO(10) grand unified theories with dynamical Yukawa couplings

Supersymmetric Grand Unified Theories and Yukawa Unification

Supersymmetric grand unified theories: Two-loop evolution of gauge and Yukawa couplings.

We make a numerical study of gauge and Yukawa unification in super-symmetric grand unified models and examine the quantitative implications of fermion mass ansätze at the grand unified scale. Integrating the renor

Grand Unified Theories

In spite of all the successes of the Standard Model [SM] it is unlikely to be the final theory. It leaves many unanswered questions. Why the local gauge interactions SU(3)C × SU(2)L × U(1)Y and why 3 families of quarks and leptons? Moreover why does one family consist of the states [Q, u, d; L, e] transforming as [(3, 2, 1/3), (3̄, 1,−4/3), (3̄, 1, 2/3); (1, 2,−1), (1, 1, 2)], where Q = (u, d) an...

Soft Yukawa couplings in supersymmetric theories

The possibility of radiatively generated fermion masses arising from chiral flavor violation in soft supersymmetry-breaking terms is explored. Vacuum stability constraints are considered in various classes of models, and allow in principle all of the first and second generation quarks and leptons and the b-quark to obtain masses radiatively. Radiatively induced Higgs–fermion couplings have non-...

Unified minimal supersymmetric model with large Yukawa couplings.

The consequences of assuming the third-generation Yukawa couplings are all large and comparable are studied in the context of the minimal supersymmetric extension of the standard model. General aspects of the RG evolution of the parameters, theoretical constraints needed to ensure proper electroweak symmetry breaking, and experimental and cosmological bounds on low-energy parameters are present...