Phase transition in the fine structure constant

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Within the context of mass-varying neutrinos, we construct a cosmological model that has a phase transition in the electromagnetic fine structure constant αat a redshift of 0.5. The model accommodates hints of a time variable αin quasar spectra and the nonobservance of such an effect at very low redshifts. It is consistent with limits from the recombination and primordial nucleosynthesis eras and is free of instabilities.
6 pages, 1 figure. Version to appear in PLB

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High Energy Physics - Phenomenology, Astrophysics, General Relativity and Quantum Cosmology, High Energy Physics - Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/204880

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0711.4055
 http://arxiv.org/abs/0711.4055
 Phys.Lett.B660:529-533,2008
 doi:10.1016/j.physletb.2008.01.047

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arXiv