Preprint Article Version 1 This version is not peer-reviewed

Two-Photon Vibrational Transitions in O2+ as Probes of Variation of the Proton-to-Electron Mass Ratio

Version 1 : Received: 31 October 2018 / Approved: 2 November 2018 / Online: 2 November 2018 (12:58:06 CET)

A peer-reviewed article of this Preprint also exists.

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 16 O 2 + as Probes of Variation of the Proton-to-Electron Mass Ratio. Atoms 2019, 7, 1.

Journal reference: Atoms 2018, 7, 1
DOI: 10.3390/atoms7010001

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.

Subject Areas

precision measurements; fundamental constants; variation of constants; proton-to-electron mass ratio; molecular ions; forbidden transition; two-photon transition; vibrational overtone

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