Limits on the Variability of Physical Constants

(2) University of Sussex); J. D. Barrow (2); J. K. Webb (1); M. J. Drinkwater (1); V. V. Flambaum (1) ((1) University of New South Wales

arxiv: astro-ph/9709227 · v1 · submitted 1997-09-24 · 🌌 astro-ph · hep-ph

Limits on the Variability of Physical Constants

M. J. Drinkwater (1) , J. K. Webb (1) , J. D. Barrow (2) , V. V. Flambaum (1) ((1) University of New South Wales , (2) University of Sussex) This is my paper

classification 🌌 astro-ph hep-ph

keywords absorptionalphalimitsassociatedcomparedconstantconstantsdelta

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We have compared the frequency of high-redshift Hydrogen HI 21 cm absorption with that of associated molecular absorption in two quasars to place new (1 sigma) upper limits on any variation in y = g_p.alpha^2 (where alpha is the fine structure constant and g_p is the proton g-factor) of |Delta(y)/y| < 5.10^{-6} at redshifts z=0.25 and z=0.68.

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Limits on the Variability of Physical Constants

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