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Unifying cosmological and recent time variations of fundamental couplings
Thomas Dent, Steffen Stern, Christof Wetterich
A number of positive and null results on the time variation of fundamental constants have been reported. It is difficult to judge whether or not these claims are mutually consisten…
Eotvos bounds on couplings of fundamental parameters to gravity
Thomas Dent
The possible dependence of fundamental couplings and mass ratios on the gravitational potential has been bounded by comparing atomic clock frequencies over Earth's elliptical orbit…
Varying "constants" in astrophysics and cosmology and ...
Thomas Dent
We review astrophysical, cosmological and terrestrial evidence for and against the constancy of fundamental parameters of particle physics, and discuss theoretical issues of unific…
Renormalization effects on neutrino masses and mixing in a string-inspired SU(4) X SU(2)_L X SU(2)_R X U(1)_X model
T. Dent, G. K. Leontaris, A. Psallidas +1
We discuss renormalization effects on neutrino masses and mixing angles in a supersymmetric string-inspired SU(4) X SU(2)_L X SU(2)_R X U(1)_X model, with matter in fundamental and…
Non-thermal leptogenesis via direct inflaton decay without SU(2)(L) triplets
Thomas Dent, George Lazarides, Roberto Ruiz de Austri
We present a non-thermal leptogenesis scenario following standard supersymmetric hybrid inflation, in the case where light neutrinos acquire mass via the usual seesaw mechanism and…
Fermion masses and proton decay in string-inspired SU(4)*SU(2)^2*U(1)_X
Thomas Dent, George Leontaris, John Rizos
We present a supersymmetric model of fermion masses with SU(4)*SU(2)^2*U(1)_X gauge group with matter in fundamental and antisymmetric tensor representations only. The up, down, ch…