High sensitivity to mass-ratio variation in deep molecular potentials

  title={High sensitivity to mass-ratio variation in deep molecular potentials},
  author={David Hanneke and Ryan Carollo and David A. Lane},
Molecular vibrational transitions are prime candidates for model-independent searches for variation of the proton-to-electron mass ratio. Searches for present-day variation achieve highest sensitivity with deep molecular potentials. We identify several high-sensitivity transitions in the deeply bound O+2 molecular ion. These transitions are electric-dipole forbidden and thus have narrow linewidths. The most sensitive transitions take advantage of an accidental degeneracy between vibrational… 
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