MG15 - Talk detail

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Atomic parity violation (APV) experiments can provide valuable information about the Standard Model and low-energy nuclear physics. Ytterbium is an excellent system for such studies, due to its strong APV effect and the availability of many stable isotopes. This brings within reach the possibility to perform precision measurements of the isotopic dependence of the effect, which would serve as a probe of the neutron skin of the ytterbium nucleus, as well as measurements of the nuclear spin-dependent contributions to the APV effect, which would yield information about the hadronic parity violation. Our ytterbium APV experiment recently reached its first milestone, namely the observation for the first time, of the isotopic variation of the APV effect, as predicted by the electroweak theory. We will present the result of these measurements, and discuss future prospects for determining nuclear spin-dependent APV effects as well as neutron distributions in ytterbium.

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