1,035 research outputs found
Maximal Acceleration Limits on the Mass of the Higgs Boson
Caianiello's quantum geometrical model with maximal acceleration places the
upper limit GeV on the mass of the Higgs boson. The model also
provides an equation linking the mass of the W boson to the Higgs mass
and independent symmetry breaking and mass generating mechanisms. These may
further restrict the value of .Comment: LaTex file, 13 pages, to be published in Il Nuovo Cimento
Double Scalar-Tensor Gravity Cosmologies
We investigate homogeneous and isotropic cosmological models in scalar-tensor
theories of gravity where two scalar fields are nonminimally coupled to the
geometry. Exact solutions are found, by Noether symmetries, depending on the
form of couplings and self-interaction potentials. An interesting feature is
that we deal with the Brans-Dicke field and the inflaton on the same ground
since both are nonminimally coupled and not distinguished {\it a priori} as in
earlier models. This fact allows to improve dynamics to get successful extended
inflationary scenarios. Double inflationary solutions are also discussed.Comment: LaTex file, 18 pages, no figures, 2 tables, to appear in Grav. & Cos
Propagation of quantum particles in Brans-Dicke spacetime. The case of Gamma Ray Bursts
The propagation of boson particles in a gravitational field described by the
Brans-Dicke theory of gravity is analyzed. We derive the wave function of the
scalar particles, and the effective potential experienced by the quantum
particles considering the role of the varying gravitational coupling. Besides,
we calculate the probability to find the scalar particles near the region where
a naked singularity is present. The extremely high energy radiated in such a
situation could account for the huge emitted power observed in Gamma Ray
Bursts.Comment: 9 pages, 5 figures, contributed paper to the Special Issue:
"Fundamental Constants in Physics and Their Time Variation", Modern Physics
Letters A, Guest Ed. Joan Sol\`
Neutrino Oscillations in Brans-Dicke Theory of Gravity
Flavor oscillations of neutrinos are analyzed in the framework of Brans-Dicke
theory of gravity. We find a shift of quantum mechanical phase of neutrino
proportional to and depending on the parameter .
Consequences on atmospheric, solar and astrophysical neutrinos are discussed.Comment: 9 pages, LATEX file, to appear in Mod. Phys. Lett.
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