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

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.

8 pages, 4 figures

References in corpus (20)

• Frequency ratio of two optical clock transitions in ${}^{171}$Yb${}^{+}$ and constraints on the time-variation of fundamental constants
• Searching for dilaton dark matter with atomic clocks
• Searching for dark matter and variation of fundamental constants with laser and maser interferometry
• Enhanced laboratory sensitivity to variation of the fine-structure constant using highly-charged ions
• Neutron scattering and extra short range interactions
• Coherent laser spectroscopy of highly charged ions using quantum logic
• Hole transitions in multiply-charged ions for precision laser spectroscopy and searching for alpha-variation
• Highly charged ions with E1, M1, and E2 transitions within laser range
• 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${}^{+}$
• Constraints on new interactions from neutron scattering experiments
• Detection of the $5p-4f$ orbital crossing and its optical clock transition in Pr${}^{9+}$
• Beyond the charge radius: the information content of the fourth radial moment
• Probing new intra-atomic force with isotope shifts
• Optical clocks based on the Cf${}^{15+}$ and Cf${}^{17+}$ ions
• Atomic properties of Cd-like and Sn-like ions for the development of frequency standards and search for the variation of the fine-structure constant
• Unexpectedly large difference of the electron density at the nucleus in the 4p ${}^2$P${}_{1/2,3/2}$ fine-structure doublet of Ca${}^{+}$
• Non-linear isotope-shift effects in Be-like, B-like, and C-like argon
• Algorithmic Ground-state Cooling of Weakly-Coupled Oscillators using Quantum Logic
• Highly charged ions for atomic clocks and search for variation of the fine structure constant
• Visible transitions in Ag-like and Cd-like lanthanide ions

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• Model-QED-operator approach to relativistic calculations of the nuclear recoil effect in many-electron atoms and ions
• Excited-state magnetic properties of carbon-like ${\text{Ca}}^{14+}$
• Isotope-shift analysis with the $4f^{14}6s^2{}^1{S}_0-4f^{13}5d6s^2(J=2)$ transition in ytterbium
• Intercombination line frequencies in ${}^{171}$Yb validated with the clock transition
• Cold highly charged ions in a radio-frequency trap with superconducting magnetic shielding
• Oscillating nuclear charge radii as sensors for ultralight dark matter
• Radiative and photon-exchange corrections to New Physics contributions to energy levels in few-electron ions
• Quantum Sensing Using Atomic Clocks for Nuclear and Particle Physics
• The dual King relation