Measuring Nuclear Spin Dependent Parity Violation With Molecules: Experimental Methods and Analysis of Systematic Errors

Abstract

Nuclear spin-dependent parity violation (NSD-PV) effects in atoms and molecules arise from $Z^0$ boson exchange between electrons and the nucleus, and from the magnetic interaction between electrons and the parity-violating nuclear anapole moment. It has been proposed to study NSD-PV effects using an enhancement of the observable effect in diatomic molecules [D. DeMille $\text{et al.}$, Phys. Rev. Lett. $\text{100}$, 023003 (2008)]. Here, we demonstrate measurements of this type with sensitivity surpassing that of any previous atomic PV measurement, using the test system ${}^{138}\mathrm{B}{\mathrm{a}}^{19}\mathrm{F}$. We show that systematic errors associated with our technique can be suppressed to at least the level of the present statistical sensitivity. With $\sim 170$ hours of data, we measure the matrix element, $W$, of the NSD-PV interaction with uncertainty $\delta W/(2\pi )<0.7$ Hz, for each of two configurations where $W$ must have different signs. This sensitivity would be sufficient to measure NSD-PV effects of the size anticipated across a wide range of nuclei.

25 pages, 15 figures, This longer article provides more details about our experimental techniques, measurement methods and analysis of the systematic uncertainty described briefly in the short version in arXiv:1801.05316

References in corpus (4)

• Using Molecules to Measure Nuclear Spin-Dependent Parity Violation
• Probing low-mass vector bosons with parity nonconservation and nuclear anapole moment measurements in atoms and molecules
• Electron correlation and nuclear charge dependence of parity-violating properties in open-shell diatomic molecules
• An Easily Constructed, Tuning Free, Ultra-broadband Probe for NMR

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