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Probing new bosons and nuclear structure with ytterbium isotope shifts
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abstract
In this Letter, we present mass-ratio measurements on highly charged Yb$^{42+}$ ions with a precision of $4\times 10^{-12}$ and isotope-shift measurements on Yb$^{+}$ on the $^{2}$S$_{1/2}$ $\to$ $^{2}$D$_{5/2}$ and $^{2}$S$_{1/2}$ $\to$ $^{2}$F$_{7/2}$ transitions with a precision of $4\times 10^{-9}$ for the isotopes $^{168,170,172,174,176}$Yb. We present a new method that allows us to extract higher-order changes in the nuclear charge distribution along the Yb isotope chain, benchmarking ab-initio nuclear structure calculations. Additionally, we perform a King plot analysis to set bounds on a fifth force in the keV$/c^2$ to MeV$/c^2$ range coupling to electrons and neutrons.
Forward citations
Cited by 3 Pith papers
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Long-lived metastable states in the 4f$^{13}$5d6s configuration of Yb$^+$
First measurements of second-scale metastable lifetimes in the 4f13 5d6s configuration of Yb+: 0.92(8) s, 9.8(+2.9,-2.0) s, plus evidence for >30 s.
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Towards a Global Search for New Physics with Isotope Shifts
kifit, a new fit framework, combines isotope shift data from multiple elements into global constraints on new boson couplings to electrons and neutrons.
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Constraining Hamiltonians from chiral effective field theory with neutron-star data
Neutron-star data, run through fast emulators, directly constrain the six two-nucleon low-energy constants of an N2LO chiral Hamiltonian, with future detectors able to strongly pin down the 3P1 channel.
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