Accuracy estimation of the 16O2+ transition frequencies targeting the search for the variation in mp/me

TL;DR

This paper evaluates the accuracy of 16O2+ vibrational transition frequencies for detecting potential variations in the proton-to-electron mass ratio, emphasizing the importance of Stark and Zeeman shifts in precise measurements.

Contribution

It provides an analysis of Stark and Zeeman shifts in 16O2+ vibrational transitions, identifying more advantageous transitions for searching for variations in {bc}.

Findings

X2b1/2(v,J) transition frequencies are more suitable for bc variation searches.

Transition frequencies between specific vibrational states show high sensitivity due to accidental degeneracy.

Stark and Zeeman shifts significantly influence the precision of frequency measurements.

Abstract

The precise measurement of molecular vibrational transition frequencies is useful in the search for variation in the proton-to-electron mass ratio {\mu}. Homonuclear diatomic molecules are particularly advantageous for precise measurement because of the small Stark shift. This paper discusses the Stark and Zeeman shifts in the 16O2+ vibrational transition frequencies.To search for the variation {\mu}(<10-17/yr), the X2{\Pi}1/2(v,J)=(0,1/2)-(v',1/2)(v'>1)in transition frequencies are much more advantageous than the transition frequencies between the X2{\Pi}1/2 v=21 and a4{\Pi}1/2 v=0 states, whose sensitivity to the variation in {\mu} is high because of the accidental degeneracy.