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arXiv · 2503.08210

Constraints on new vector boson mediated electron-nucleus interactions from spectroscopy of polar diatomic molecules

Konstantin Gaul·Lei Cong·Dmitry Budker
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Abstract

A measurement of parity violation in the hyperfine structure of $^{138}$Ba$^{19}$F [E. Altunta\c{s} et al. Phys. Rev. Lett. 120, 142501 (2018)] is reinterpreted with electronic structure calculations in terms of beyond Standard Model vector boson mediated electron-nucleus interactions. Our results set constraints on previously unexplored, new boson mediated axial vector-vector nucleus-electron interactions. Similar bounds are obtained by analyzing the atomic parity violation experiment with $^{133}$Cs. Moreover, we show that future experiments with cold heavy diatomic molecules like $^{225}$RaF can improve the present sensitivity to axial vector-vector nucleus-electron and nucleon-nucleus interactions by up to five orders of magnitudes.

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Konstantin Gaul, Lei Cong, Dmitry Budker. 2025-03-11. Constraints on new vector boson mediated electron-nucleus interactions from spectroscopy of polar diatomic molecules. https://arxiv.org/abs/2503.08210

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