Search

A huge value of cosmological constant characteristic for the particle physics and the inflation of early Universe are inherently related to each other: one can construct a fine-tuned superpotential, which produces a flat potential of inflaton with a constant density of energy $V=\Lambda^4$ after taking into account for leading effects due to the supergravity, so that an introduction of small quantum loop-corrections to parameters of this superpotential naturally results in the dynamical instability relaxing the primary cosmological constant by means of inflationary regime. The model phenomenologically agrees with observational data on the large scale structure of Universe at $\Lambda~10^{16}$ GeV., Comment: 24 pages, 22 figures and diagrams, revtex4, references and notes added

Regime of MOND, which is used in astronomy to describe the gravitating systems of island type without the need to postulate the existence of a hypothetical dark matter, is generalized to the case of homogeneous distribution of usual matter by introducing a linear dependence of the critical acceleration on the size of region under consideration. We show that such the extrapolation of MOND in cosmology is consistent with both the observed dependence of brightness on the redshift for type Ia supernovae and the parameters of large-scale structure of Universe in the evolution, that is determined by the presence of a cosmological constant, the ordinary matter of baryons and electrons as well as the photon and neutrino radiation without any dark matter., Comment: 20 pages, 5 figures, comments added

The Higgs boson of Standard Model, minimally coupled to the gravitation, is not able to produce the inflation of early Universe if its mass exceeds the threshold value, which is equal to m_H^{min} = 142 GeV in the tree approximation for the scalar potential. Two-loop corrections modify the estimate as m_H^{min} = 150 \pm 3 GeV, so that higher-order corrections of perturbation theory are completely under control, though they are numerically important in respect of experimental searches., Comment: 6 pages

A permissible spectrum of transverse vibrations for the holographic screen modifies both a distribution of thermal energy over bits at low temperatures and the law of gravitation at small accelerations of free fall in agreement with observations of flat rotation curves in spiral galaxies. This modification relates holographic screen parameters in de Sitter space-time with the Milgrom acceleration in MOND., Comment: 7 pages, 1 figure

We argue for a model of low-energy correction to the inflationary potential as caused by the gauge-mediated breaking down the supersymmetry at the scale of $\mu_\textsc{x}\sim 10^4$ GeV, that provides us with the seesaw mechanism of thin domain wall fluctuations in the flat vacuum. The fluctuations are responsible for the vacuum with the cosmological constant at the scale of $\mu_\Lambda\sim 10^{-2}$ eV suppressed by the Planckian mass $m_\mathtt{Pl}$ via $\mu_\Lambda\sim\mu_\textsc{x}^2/m_\mathtt{Pl}$. The appropriate vacuum state is occupied after the inflation with quartic coupling constant $\lambda\sim\mu_\textsc{x}/m_\mathtt{Pl}\sim 10^{-14}$ inherently related with the bare mass scale of $\widetilde m\sim\sqrt{\mu_\textsc{x}m_\mathtt{Pl}}\sim 10^{12}$ GeV determining the thickness of domain walls $\delta r\sim1/\widetilde m$. Such the parameters of potential are still marginally consistent with the observed inhomogeneity of matter density in the Universe. The inflationary evolution suggests the vacuum structure compatible with three fermionic generations of matter as well as with observed hierarchies of masses and mixing in the Standard Model., Comment: 12 pages, 1 figure, revtex4 class, references added

On the basis of postulates for the holographic description of gravity and the introduction of entropic force, for static sources we derive the universal law: the entropy of a holographic screen is equal to quarter of its area in the Planck system of units., Comment: 6 pages

The constraint on the mass of Higgs field in the Standard Model at the minimal interaction with the gravity is derived in the form of lower bound $m_H> 150$ GeV by the strict requirement of decoupling the Higgs boson from the inflation of early Universe: the inflation produced by the Higgs scalar could crucially destroy visible properties of large scale structure of Universe, while the large mass makes the Higgs particle not able to produce the inflation and shifts its cosmological role into the region of quantum gravity., Comment: 6 pages, svjour class, comments and reference added

Inflation with a scalar-field potential of the form \lambda (\phi^2-v^2)^2 can be described in terms of a parametrical attractor with critical points, whose driftage depends on the control value of the slowly changing Hubble rate. The method allows us to easily obtain theoretical expressions for fluctuations of inhomogeneity in both the cosmic microwave background and distribution of matter. We find the region for admissible values of potential parameters, wherein theoretical predictions are consistent with experimental results within the limits of measurement uncertainties., Comment: 10 pages, 2 eps-figures, revtex4, submitted to Gen.Rel.Grav

At high e-foldings of expansion, the inflation with the quartic potential exhibits the parametric attractor governed by the slowly running Hubble rate. This quasiattractor simplifies the analysis of predictions for the inhomogeneity generated by the quantum fluctuations of inflaton. The method reveals the connection of inflation e-folding with general parameters of preheating regime in various scenarios and observational data., Comment: 8 pages, 3 figures, revtex class, absract and conclusion modified, equation (67) and its dicussion added in section III.B.1, minor edition of introduction and section III.B.2 performed

The observed small value of cosmological constant can be naturally related with the scale of breaking down supersymmetry in agreement with other evaluations in particle physics., Comment: 12 pages, revtex4 class, 2 eps-figures

The cosmological constant is inherently determined by the scale of breaking down supersymmetry in the mechanism of seesaw fluctuations of two vacuum-states., Comment: 4 pages, revtex4 class, reference added