Abstract In the construction of a classical smoothed out brane world model in five dimensions, one uses a dynamically generated domain wall (a kink) to localise an effective four dimensional theory.… (More)

The effective potential at finite temperature is constructed within the minimal standard model when a real Higgs singlet is added on. We find that a region of parameter space exists for which one can… (More)

Studies of neutrino asymmetries generated by ordinary-sterile neutrino oscillations in the early Universe and implications for big bang nucleosynthesis bounds Abstract Ordinary-sterile neutrino… (More)

It has been proposed that the annihilation process νν → ee → γγ may be responsible for the generation of gamma-ray bursts (GRBs). The incipient neutrino–antineutrino pairs carry virtually all of the… (More)

Oscillations between ordinary and sterile neutrinos can generate large neu-trino asymmetries in the early universe. These asymmetries can significantly affect big bang nucleosynthesis (BBN) through… (More)

How neutrino oscillations can induce an effective neutrino number of less than 3 during Big Bang Nucleosynthesis. Abstract Ordinary-sterile neutrino oscillations can generate significant neutrino… (More)

We comment on the recent paper by A. D. Dolgov, S. H. Hansen, S. Pastor and D. V. Semikoz (DHPS) [Astropart. Phys. 14, 79 (2000)] on the generation of neutrino asymmetries from active–sterile… (More)

We consider a brane generated by a scalar field domain wall configuration in 4+1 dimensions, interpolating, in most cases, between two vacua of the field. We study the cosmology of such a system in… (More)

If scale invariance is a classical symmetry then both the Planck scale and the weak scale should emerge as quantum effects. We show that this can be realized in simple scale invariant theories with a… (More)

We show that the anomalous acceleration of the Pioneer 10/11 spacecraft can be explained if there is some mirror gas or mirror dust in our solar system.