Improved isotope-shift-based bounds on bosons beyond the Standard Model through measurements of the ${}^2$D${}_{3/2}{-}^2$D${}_{5/2}$ interval in Ca${}^{+}$

Cyrille Solaro, Steffen Meyer, Karin Fisher +3

We perform high-resolution spectroscopy of the $3$d${}^2$D${}_{3/2}-3$d${}^2$D${}_{5/2}$ interval in all stable even isotopes of ${}^A$Ca${}^{+}$ (A = 40, 42, 44, 46 and 48) with an accuracy…