Carollo, R.; Frenett, A.; Hanneke, D. Two-Photon Vibrational Transitions in 16O2+ as Probes of Variation of the Proton-to-Electron Mass Ratio. Atoms2019, 7, 1.
Carollo, R.; Frenett, A.; Hanneke, D. Two-Photon Vibrational Transitions in
16
O
2
+
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. Atoms2019, 7, 1.
Carollo, R.; Frenett, A.; Hanneke, D. Two-Photon Vibrational Transitions in
16
O
2
+
as Probes of Variation of the Proton-to-Electron Mass Ratio. Atoms 2019, 7, 1.
Abstract
Vibrational overtones in deeply bound molecules are sensitive probes for variation of the proton-to-electron mass ratio μ. In nonpolar molecules, these overtones may be driven as two-photon transitions. Here, we present procedures for experiments with O2+, including state-preparation through photoionization, a two-photon probe, and detection. We calculate transition dipole moments between all X2Пg vibrational levels and those of the A2Пu 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 O2+ provide multiple routes to improved searches for μ variation.
Keywords
precision measurements; fundamental constants; variation of constants; proton-to-electron mass ratio; molecular ions; forbidden transition; two-photon transition; vibrational overtone
Subject
Physical Sciences, Atomic and Molecular Physics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
