منابع مشابه
Non - Thermal Production of Dangerous Relics in the Early Universe
Many models of supersymmetry breaking, in the context of either supergravity or superstring theories, predict the presence of particles with weak scale masses and Planck-suppressed couplings. Typical examples are the scalar moduli and the gravitino. Excessive production of such particles in the early Universe destroys the successful predictions of nucleosynthesis. In particular, the thermal pro...
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Ageneral solution,basedontheseparationofvariablesmethod,for the thermal spreadingresistance incompound annular sectors, is presented. Results are given for three heat ux distributions: inverse parabolic, uniform, and parabolic pro les. The general solution can be used to model any number of equally spaced heat sources on a compound or isotropic annulus. Graphical results are presented for a ...
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متن کاملCosmological bounds on masses of neutrinos and other thermal relics
With the advent of precision data, cosmology has become an extremely powerful tool for probing particle physics. The prime example of this is the cosmological bound on light neutrino masses. Here I review the current status of cosmological neutrino mass bounds as well as the various uncertainties involved in deriving them. From WMAP, SDSS, and Lyman-α forest data an upper bound on the sum of ne...
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A SU(4) flavor symmetrical Lagrangian is constructed for the interaction of the pseudo-scalar mesons with the vector mesons. SU(4) symmetry is broken to SU(3) by suppression of terms in the Lagrangian where the interaction should be driven by charmed mesons. Chiral symmetry can be restored by setting this new SU(4) symmetry breaking parameters to zero. Unitarization in coupled channels leads to...
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ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2008
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2008/10/043