Fiona Kirk

activity

20192026

most citedGlobal Electroweak Fit and Vector-Like Leptons in Light of the Cabibbo Angle Anomaly

96 citations · 382 across the 16 of their papers we have counts for

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physics.atom-ph2025

Towards a Global Search for New Physics with Isotope Shifts

Elina Fuchs, Fiona Kirk, Agnese Mariotti +2

Isotope shifts have emerged as a sensitive probe of new bosons that couple to electrons and neutrons, and of nuclear structure. The recent Hz- or even sub-Hz-level isotope shift me…

physics.atom-ph2024★ 39 cited

Probing new bosons and nuclear structure with ytterbium isotope shifts

Menno Door, Chih-Han Yeh, Matthias Heinz +24

In this Letter, we present mass-ratio measurements on highly charged Yb $^{42 +}$ ions with a precision of $4 \times 1 0^{- 12}$ and isotope-shift measurements on Yb $^{+}$ on the $^{2}$ …