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Georg Kreyerhoff

Publications and source records attributed to Georg Kreyerhoff.

21 records · Page 2Linked to original sources
arXiv1999

On the possible dark-matter content of QSO's and of compact, very massive entities in the nuclei of galaxies: a metastable particle with mass of about 10^10 GeV

We examine some general astrophysical results which can be related to the hypothesis that very heavy, metastable particles constitute compact, very massive central entities in QSO's and the core of galaxies. The mass and lifetime have been calculated in detail previously: the mass is about $10^{10}\GeV$; the lifetime is $\simgt 10^{21} \sec$. The specific decay gives rise to a new source of very large amounts of energy in radiation. The essence of the ideas discussed in this paper is that very massive, metastable dark matter constitutes entities near to black-hole conditions, and that it is decay which provides a large primary energy source from such entities, as components of QSO's, AGN, and possibly GRB's.

astro-ph↗
arXiv1998

The Inflaton As Dark Matter

Within the framework of an explicit dynamical model, in which we calculate the radiatively-corrected, tree-level potential that sets up inflation, we show that the inflaton can be a significant part of dark matter today. We exhibit potentials with both a maximum and a minimum. Using the calculated position of the potential minimum, and an estimate for fluctuations of the inflaton field in the early universe, we calculate a contribution to the matter energy density of $(1-2)\times 10^{-47}\GeV^4$ in the present universe, from cold inflatons with mass of about $6\times 10^9\GeV$. We show that the inflaton might decay in a specific way, and we calculate a possible lifetime that is several orders of magnitude greater than the present age of the universe. Inflaton decay is related to an interaction which, together with a spontaneous breakdown of CP invariance at a cosmological energy scale, can give rise to a neutrino-antineutrino asymmetry just prior to the time of electroweak symmetry breaking.

hep-ph↗