Supernovae as a probe of particle physics and cosmology

Details Supernovae as a probe of particle physics and cosmology Supernovae as a probe of particle physics and cosmology

2001-11-27

arxiv.org/abs/hep-ph/0111335v3

Phys.Rev. D65 (2002) 123510

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, LaTeX, 4 figures; v2: typos corrected, minor changes, references added; v3: updated figures, details regarding fits

Scientific paper

10.1103/PhysRevD.65.123510

It has very recently been demonstrated by Csaki, Kaloper and Terning (CKT) that the faintness of supernovae at high redshift can be accommodated by mixing of a light axion with the photon in the presence of an intergalactic magnetic field, as opposed to the usual explanation of an accelerating universe by a dark energy component. In this paper we analyze further aspects of the CKT mechanism and its generalizations. The CKT mechanism also passes various cosmological constraints from the fluctuations of the CMB and the formation of structure at large scales, without requiring an accelerating phase in the expansion of the Universe. We investigate the statistical significance of current supernova data for pinning down the different components of the cosmological energy-momentum tensor and for probing physics beyond the standard models.

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