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

2025/03/11 by Konstantin Gaul, Gaul, Konstantin, Lei Cong +3
Chemistry · Engineering · Physics and Astronomy · #Advanced Chemical Physics Studies #Atomic Physics (physics.atom-ph) #Chemical Physics (physics.chem-ph) #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Molecular Junctions and Nanostructures #Molecular Spectroscopy and Structure

paper · pdf · doi:10.48550/arxiv.2503.08210

openalex publication_date 2025/03/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A measurement of parity violation in the hyperfine structure of ¹³⁸Ba¹⁹F [E. Altuntaş 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 ¹³³Cs. Moreover, we show that future experiments with cold heavy diatomic molecules like ²²⁵RaF 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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