Varying Alpha: New Constraints from Seasonal Variations
arXiv:0806.4317 · doi:10.1103/PhysRevD.78.067304
Abstract
We analyse the constraints obtained from new atomic clock data on the possible time variation of the fine structure `constant' and the electron-proton mass ratio and show how they are strengthened when the seasonal variation of Sun's gravitational field at the Earth's surface is taken into account. We compare these bounds with those obtainable from tests of the Weak Equivalence Principle and high-redshift observations of quasar absorption spectra consistent with time variations in the fine structure constant.
4 pages, 1 figure
References in corpus (8)
- Test of the Equivalence Principle Using a Rotating Torsion Balance
- New Limits on Coupling of Fundamental Constants to Gravity Using Sr Optical Lattice Clocks
- Strong Limit on a Variable Proton-to-Electron Mass Ratio from Molecules in the Distant Universe
- Enhanced sensitivity to time-variation of m_p/m_e in the inversion spectrum of ammonia
- Revision of VLT/UVES constraints on a varying fine-structure constant
- Comment on "Limits on the Time Variation of the Electromagnetic Fine-Structure Constant in the Low Energy Limit from Absorption Lines in the Spectra of Distant Quasars"
- Limit on the Temporal Variation of the Fine-Structure Constant Using Atomic Dysprosium
- Eotvos bounds on couplings of fundamental parameters to gravity