Search for variation of fundamental constants: Strong enhancements in $X^2\Pi$ cations of dihalogens and hydrogen halides

Abstract

We propose to use diatomic molecular ions to search for strongly enhanced effects of variation of fundamental constants. The relative enhancement occurs in transitions between nearly degenerate levels of different nature. Since the trapping techniques for molecular ions have already been developed, the molecules HBr${}^{+}$, HI${}^{+}$, Br${}_2^{+}$, I${}_2^{+}$, IBr${}^{+}$, ICl${}^{+}$, and IF${}^{+}$ are very promising candidates for such future studies.

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Cited by in corpus (10)

• Search for New Physics with Atoms and Molecules
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• Material Size Dependence on Fundamental Constants
• Two-photon vibrational transitions in ${\mathrm{O}}_2^{+}$ as probes of variation of the proton-to-electron mass ratio
• Diatomic rovibronic transitions as potential probes for proton-to-electron mass ratio across cosmological time
• Prospects of nuclear-coupled-dark-matter detection via correlation spectroscopy of I${}_2^{+}$ and Ca${}^{+}$
• Manifestations of dark matter and variations of fundamental constants in atoms and astrophysical phenomena
• Photodissociation spectroscopy of the dysprosium monochloride molecular ion