Probing unification scenarios with atomic clocks

Abstract

We discuss the usage of measurements of the stability of nature's fundamental constants coming from comparisons between atomic clocks as a means to constrain coupled variations of these constants in a broad class of unification scenarios. After introducing the phenomenology of these models we provide updated constraints, based on a global analysis of the latest experimental results. We obtain null results for the proton-to-electron mass ratio ${\dotμ}/μ=(0.68\pm5.79)\ti mes10^{-16}\, {\rm yr}{}^{-1}$ and for the gyromagnetic factor ${\dot{g}}_p/g_p=(-0.72\pm 0.89)\times 10^{-16}\mathrm{yr}{}^{-1}$ (both of these being at the 95 % confidence level). These results are compatible with theoretical expectations on unification scenarios, but much freedom exists due to the presence of a degeneracy direction in the relevant parameter space.

5 pages

References in corpus (5)

• New Limits on Coupling of Fundamental Constants to Gravity Using ${}^{87}$Sr Optical Lattice Clocks
• Stability of the proton-to-electron mass ratio
• Coupled Variations of Fundamental Couplings and Primordial Nucleosynthesis
• Improved tests of Local Position Invariance using 87Rb and 133Cs fountains
• Limits on temporal variation of quark masses and strong interaction from atomic clock experiments

Cited by in corpus (5)

• Improved limit on a temporal variation of $m_p/m_e$ from comparisons of Yb${}^{+}$ and Cs atomic clocks
• Stability of fundamental couplings: a global analysis
• Fundamental cosmology in the E-ELT era: The status and future role of tests of fundamental coupling stability
• Consistency tests of the stability of fundamental couplings and unification scenarios
• Further consistency tests of the stability of fundamental couplings