A small cosmological constant from the modified Brans-Dicke theory - an interplay between different energy scales

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dc.creatorSmolyakov, Mikhail N.
dc.date2007-11-26
dc.date2007-12-02
dc.date.accessioned2026-07-07T08:46:15Z
dc.date.available2026-07-07T08:46:15Z
dc.descriptionIn this paper we discuss a model in which the energy density, corresponding to the effective cosmological constant, after the $SU(2)\times U(1)$ symmetry breaking appears to be of the desired order of $10^{-48}÷10^{-47} GeV^{4}$. The model contain two different energy scales, one of which is associated with the Higgs's vacuum expectation value. Another scale is of the order of $10^{21}GeV$ and defines the vacuum expectation value of the Brans-Dicke scalar field, non-minimally coupled to gravity, and sets the value of the Planck mass. Other (dimensionless) parameters are assumed not to contain hierarchical differences. The model is devoid of any fine-tuning and gives a small value of the effective cosmological constant even if the real "bare" cosmological constant is quite large.
dc.description10 pages, LaTeX, references added
dc.identifierhttps://arxiv.org/abs/0711.3811
dc.identifierhttp://arxiv.org/abs/0711.3811
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/143191
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleA small cosmological constant from the modified Brans-Dicke theory - an interplay between different energy scales
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