May 29, 2018 to June 3, 2018
Hyatt Regency Indian Wells Conference Center
US/Pacific timezone

Progress Towards Measurement of the Nuclear Anapole Moment of Ba-137 Using BaF Molecules

Jun 1, 2018, 6:30 PM
East Foyer (Hyatt Regency Indian Wells Conference Center)

East Foyer

Hyatt Regency Indian Wells Conference Center

44600 Indian Wells Lane, Indian Wells, CA 92210, USA
Board: 7
Poster TSEI Poster Session


Dr Sidney Cahn (Yale University)


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. Here, we demonstrate measurements of this type with sensitivity to NSD-PV effects surpassing that of any previous atomic PV measurement, using the test system $^{138}$Ba$^{19}$F. With $\sim$168 hours of data, we measure the matrix element, $W$, of the NSD-PV interaction with combined statistical and systematic uncertainty $\delta W < 0.7$ Hz. The sensitivity we demonstrate would be sufficient to measure NSD-PV effects of the size anticipated across a wide range of nuclei. We describe the details of our method and future improvements, including an extensive study of systematic errors associated with our technique, and show that these can be controlled at least at the level of the present statistical sensitivity.
E-mail [email protected]
Collaboration name ZOMBIES
Funding source NSF

Primary author

Dr Sidney Cahn (Yale University)


Prof. David DeMille (Yale University) Dr Emine Altuntas (NIST) Prof. Jai-Min Choi (Chonbuk National University) Dr Jeffrey Ammon (MIT Lincoln Lab)

Presentation materials