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Time Variation of Fine Structure Constant and Proton-Electron Mass Ratio with Quintessence | Seokcheon Lee
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2 Feb 2007 | Abstract: | Recent astrophysical observations of quasar absorption systems indicate that the fine structure constant $alpha$ and the proton-electron mass ratio $mu$ may have evolved through the history of the universe. Motivated by these observations, we consider the cosmological evolution of a quintessence-like scalar field $phi$ coupled to gauge fields and matter which leads to effective modifications of the coupling constants and particle masses over time. We show that a class of models where the scalar field potential $V(phi)$ and the couplings to matter $B(phi)$ admit common extremum in $phi$ naturally explains constraints on variations of both the fine structure constant and the proton-electron mass ratio. | Source: | arXiv, astro-ph/0702063 | Services: | Forum | Review | PDF | Favorites |
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