Observation of non-linearity of generalized King plot in the search for new boson

Koki Ono, Yugo Saito, Taiki Ishiyama +6

We measure isotope shifts for neutral Yb isotopes on an ultranarrow optical clock transition ${}^1{\text{S}}_0{-}^3{\text{P}}_0$ with an accuracy of a few Hz. The part-per-billion…