Two-Photon Vibrational Transitions in 16O2+ as Probes of Variation of the Proton-to-Electron Mass Ratio
Physics & Astronomy Department, Amherst College, Amherst, MA 01002, USA
Author to whom correspondence should be addressed.
Received: 31 October 2018 / Revised: 14 December 2018 / Accepted: 18 December 2018 / Published: 20 December 2018
Vibrational overtones in deeply-bound molecules are sensitive probes for variation of the proton-to-electron mass ratio
. In nonpolar molecules, these overtones may be driven as two-photon transitions. Here, we present procedures for experiments with
, including state-preparation through photoionization, a two-photon probe, and detection. We calculate transition dipole moments between all
vibrational levels and those of the
excited electronic state. Using these dipole moments, we calculate two-photon transition rates and AC-Stark-shift systematics for the overtones. We estimate other systematic effects and statistical precision. Two-photon vibrational transitions in
provide multiple routes to improved searches for
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Carollo, R.; Frenett, A.; Hanneke, D. Two-Photon Vibrational Transitions in 16O2+ as Probes of Variation of the Proton-to-Electron Mass Ratio. Atoms 2019, 7, 1.
Carollo R, Frenett A, Hanneke D. Two-Photon Vibrational Transitions in 16O2+ as Probes of Variation of the Proton-to-Electron Mass Ratio. Atoms. 2019; 7(1):1.
Carollo, Ryan; Frenett, Alexander; Hanneke, David. 2019. "Two-Photon Vibrational Transitions in 16O2+ as Probes of Variation of the Proton-to-Electron Mass Ratio." Atoms 7, no. 1: 1.
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