Unified Gauge Theories and Galaxy Formation

Hierarchy of Interactions in Unified Gauge Theories

We are really measuring the sum of the cross sections vpver+Em and ppvpm. ln, l ~ 0, but since our neutrino spectrum peaks at 500 MeV/c and is down by an order of magnitude by 1500 MeV/c, we expect the contribution of the final states with additional m. 's to be very small. J. Campbell et al. , Phys. Bev. Lett. 30, 385 (1973). More details of the experiment are given by S. J. Barish, Argonne Na...

Gauge-Yukawa-Finite Unified Theories and their Predictions

Gauge-Yukawa unified theories, and in particular those which are finite beyond the unification scale, have been extended to include a soft supersymmetry breaking (SSB) sector. In the case of the Finite Unified Theories a new solution to the condition of twoloop finiteness of the SSB parameters is found, which requires a sum rule for the relevant scalar masses. The sum rule permits violations of...

Constraints on Unified Gauge Theories from Noncommutative Geometry

The Connes and Lott reformulation of the strong and electroweak model represents a promising application of noncommutative geometry. In this scheme the Higgs field naturally appears in the theory as a particular gauge boson, connected to the discrete internal space, and its quartic potential, fixed by the model, is not vanishing only when more than one fermion generation is present. Moreover, t...

Unified gauge theories: an atomic-fly in the ointment.

Gauge Coupling Unification from Unified Theories in Higher Dimensions

A two-stage framework for unification is proposed involving grand unification, supersymmetry and extra dimensions, leading to a prediction for the strong gauge coupling, αKK s = 0.118±0.004±0.003, which is more successful and precise than that obtained from conventional supersymmetric grand unification, αSGUT s = 0.130 ± 0.004 ± ∆SGUT. Orbifold breaking of the unified gauge group leads to a non...