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arXiv · 1804.05475

Enhanced nuclear spin dependent parity violation effects using the 199HgH molecule

A. J. Geddes·L. V. Skripnikov·A. Borschevsky·J. C. Berengut·V. V. Flambaum·T. P. Rakitzis
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Abstract

Electron interactions with the nuclear-spin-dependent (NSD) parity non-conserving (PNC) anapole moment are strongly enhanced within heteronuclear diatomic molecules. A novel, low-energy optical rotation experiment is being proposed with the aim of observing NSD PNC interactions in HgH. Based on the relativistic coupled cluster method we present a complete calculation of the circular polarization parameter $P = 2\,\textrm{Im}(E1_{PNC})/M1 \approx 3 \times 10^{-6}\; κ$ for the $^2Σ_{1/2} \to ^2Π_{1/2}$ optical transition of HgH, where $κ$ is a dimensionless constant determined by the nuclear anapole moment. This provides an improvement in sensitivity to NSD PNC by 2 -- 3 orders of magnitude over the leading atomic Xe, Hg, Tl, Pb and Bi optical rotation experiments, and shows that the proposed measurement will be sensitive enough to extract the $^{199}$Hg anapole moment and shed light on the underlying theory of hadronic parity violation.

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A. J. Geddes, L. V. Skripnikov, A. Borschevsky, J. C. Berengut, V. V. Flambaum, T. P. Rakitzis. 2018-04-16. Enhanced nuclear spin dependent parity violation effects using the 199HgH molecule. https://doi.org/10.1103/physreva.98.022508

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