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  Sensitivity to New Physics of Isotope Shift Studies using the Coronal Lines of Highly Charged Calcium Ions

Rehbehn, N., Rosner, M., Bekker, H., Berengut, J. C., Schmidt, P. O., King, S. A., et al. (2021). Sensitivity to New Physics of Isotope Shift Studies using the Coronal Lines of Highly Charged Calcium Ions. Physical Review A, 103(4): L040801. doi:10.1103/PhysRevA.103.L040801.

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 Creators:
Rehbehn, Nils1, Author           
Rosner, Michael1, Author           
Bekker, Hendrik1, Author           
Berengut, Julian C.1, Author           
Schmidt, Piet O., Author
King, Steven A., Author
Micke, Peter1, Author           
Gu, Ming Feng, Author
Müller, Robert, Author
Surzhykov, Andrey, Author
Crespo López-Urrutia, José Ramón1, Author           
Affiliations:
1Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society, ou_2025284              

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Free keywords: Physics, Atomic Physics, physics.atom-ph
 Abstract: Promising searches for new physics beyond the current Standard Model (SM) of
particle physics are feasible through isotope-shift spectroscopy, which is
sensitive to a hypothetical fifth force between the neutrons of the nucleus and
the electrons of the shell. Such an interaction would be mediated by a new
particle which could in principle be associated with dark matter. In so-called
King plots, the mass-scaled frequency shifts of two optical transitions are
plotted against each other for a series of isotopes. Subtle deviations from the
expected linearity could reveal such a fifth force. Here, we study
experimentally and theoretically six transitions in highly charged ions of Ca,
an element with five stable isotopes of zero nuclear spin. Some of the
transitions are suitable for upcoming high-precision coherent laser
spectroscopy and optical clocks. Our results provide a sufficient number of
clock transitions for -- in combination with those of singly charged Ca$^+$ --
application of the generalized King plot method. This will allow future
high-precision measurements to remove higher-order SM-related nonlinearities
and open a new door to yet more sensitive searches for unknown forces and
particles.

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 Dates: 2021-04-21
 Publication Status: Published online
 Pages: 8 pages, 4 figures
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2102.02309
DOI: 10.1103/PhysRevA.103.L040801
 Degree: -

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Title: Physical Review A
  Other : Physical Review A: Atomic, Molecular, and Optical Physics
  Other : Phys. Rev. A
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 103 (4) Sequence Number: L040801 Start / End Page: - Identifier: ISSN: 1050-2947
CoNE: https://pure.mpg.de/cone/journals/resource/954925225012_2