Abstract
In this Letter, we present mass-ratio measurements on highly charged Yb42+ ions with a precision of 4×10-12 and isotope-shift measurements on Yb+ on the S21/2→D5/22 and S21/2→F7/22 transitions with a precision of 4×10-9 for the isotopes Yb168,170,172,174,176. 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/c2 to MeV/c2 range coupling to electrons and neutrons.
| Original language | English |
|---|---|
| Article number | 063002 |
| Journal | Physical Review Letters |
| Volume | 134 |
| Issue number | 6 |
| DOIs | |
| State | Published - Feb 14 2025 |
Funding
We thank the referees for very valuable feedback on the manuscript. We thank Joonseok Hur, Martin Steinel, and Vladan Vuletić for helpful discussions. This work is supported by the Max Planck Society (MPG), the International Max Planck Research Schools for Precision Tests of Fundamental Symmetries (IMPRS-PTFS), the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme under Grant Agreements No. 832848 (FunI) and No. 101020842 (EUSTRONG), and by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—Project-ID 273811115—SFB 1225 ISOQUANT as well as under Germany’s Excellence Strategy—EXC-2123 QuantumFrontiers—390837967 (RU B06) and through Grant No. CRC 1227 (DQ-mat, projects B02 and B03). This work has been supported by the Max-Planck-RIKEN-PTB-Center for Time, Constants, and Fundamental Symmetries. L. S. D. acknowledges support from the Alexander von Humboldt Foundation. This work comprises parts of the Ph.D. thesis work of M. D. submitted to Heidelberg University, Germany, parts of the Ph.D. thesis work of C.-H. Y. submitted to Leibniz Universität Hannover, Germany, and parts of the Ph.D. thesis work of M. H. submitted to the TU Darmstadt, Germany. M. H., T. M., and A. S. gratefully acknowledge the computing time provided on the high-performance computer Lichtenberg at the NHR Centers NHR4CES at TU Darmstadt and the Gauss Centre for Supercomputing e.V. for funding this project by providing computing time through the John von Neumann Institute for Computing (NIC) on the GCS Supercomputer JUWELS at Jülich Supercomputing Centre (JSC). N. S. acknowledges the support of the “Program for promoting research on the supercomputer Fugaku,” MEXT, Japan (JPMXP1020230411), and the MCRP program of the Center for Computational Sciences, University of Tsukuba (NUCLSM). E. F. and F. K. thank CERN for their hospitality during the early phase of this work.