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Abstract: The detection of a spatial variation of the fine-structure constant, alpha,based on study of quasar absorption systems has recently been reported. Thephysics that causes this alpha-variation should have other observablemanifestations, and this motivates us to look for complementary astrophysicaleffects. In this paper we propose a method to test whether spatial variation offundamental constants existed during the epoch of big bang nucleosynthesis.Using existing measurements of primordial deuterium abundance we find very weakindications that such a signature might exist, but the paucity of measurementsprecludes any firm conclusion. We also examine existing quasar absorptionspectra data that are sensitive to variation of the electron-to-proton massratio, mu, and x = alpha^2 mu g p for spatial variation.



Author: J. C. Berengut, V. V. Flambaum, J. A. King, S. J. Curran, J. K. Webb

Source: https://arxiv.org/







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