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- W4315706814 abstract "Polyatomic molecules have been identified as sensitive probes of charge-parity violating and parity-violating physics beyond the Standard Model (BSM). For example, many linear triatomic molecules are both laser-coolable and have parity doublets in the ground electronic $tilde{X} {}^2Sigma^+ (010)$ state arising from the bending vibration, both features that can greatly aid BSM searches. Understanding the $tilde{X} {}^2Sigma^+ (010)$ state is a crucial prerequisite to precision measurements with linear polyatomic molecules. Here, we characterize fundamental bending vibration of ${}^{174}$YbOH using high-resolution optical spectroscopy on the nominally forbidden $tilde{X} {}^2Sigma^+ (010) rightarrow tilde{A} {}^2Pi_{1/2} (000)$ transition at 588 nm. We assign 39 transitions originating from the lowest rotational levels of the $tilde{X} {}^2Sigma^+ (010)$ state, and accurately model the state's structure with an effective Hamiltonian using best-fit parameters. Additionally, we perform Stark and Zeeman spectroscopy on the $tilde{X} {}^2Sigma^+ (010)$ state and fit the molecule-frame dipole moment to $D_mathrm{mol}=2.16(1)$ D and the effective electron $g$-factor to $g_S=2.07(2)$. Further, we use an empirical model to explain observed anomalous line intensities in terms of interference from spin-orbit and vibronic perturbations in the excited $tilde{A} {}^2Pi_{1/2} (000)$ state. Our work is an essential step toward searches for BSM physics in YbOH and other linear polyatomic molecules." @default.
- W4315706814 created "2023-01-12" @default.
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- W4315706814 date "2023-01-10" @default.
- W4315706814 modified "2023-10-16" @default.
- W4315706814 title "Characterizing the Fundamental Bending Vibration of a Linear Polyatomic Molecule for Symmetry Violation Searches" @default.
- W4315706814 doi "https://doi.org/10.48550/arxiv.2301.04124" @default.
- W4315706814 hasPublicationYear "2023" @default.
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