Details
| Original language | English |
|---|---|
| Article number | L040801 |
| Journal | Physical Review A |
| Volume | 103 |
| Issue number | 4 |
| Publication status | Published - 21 Apr 2021 |
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 door to yet more sensitive searches for unknown forces and particles.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Physical Review A, Vol. 103, No. 4, L040801, 21.04.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Sensitivity to new physics of isotope-shift studies using the coronal lines of highly charged calcium ions
AU - Rehbehn, Nils Holger
AU - Rosner, Michael K.
AU - Bekker, Hendrik
AU - Berengut, Julian C.
AU - Schmidt, Piet O.
AU - King, Steven A.
AU - Micke, Peter
AU - Gu, Ming Feng
AU - Müller, Robert
AU - Surzhykov, Andrey
AU - López-Urrutia, José R.Crespo
N1 - Funding Information: Financial support was provided by the Max-Planck-Gesellschaft and the Physikalisch-Technische Bundesanstalt. We acknowledge support from the Max Planck-Riken-PTB Center for Time, Constants and Fundamental Symmetries, the Deutsche Forschungsgemeinschaft through Grants No. SCHM2678/5-1 and No. SU 658/4-1, the collaborative research centers “SFB 1225 (ISOQUANT)” and “SFB 1227 (DQ-mat),” and Germany's Excellence Strategy-EXC-2123/1 QuantumFrontiers-390837967. This project also received funding from the European Metrology Programme for Innovation and Research (EMPIR) cofinanced by the Participating 5 States and from the European Union's Horizon 2020 research and innovation programme (Project No. 17FUN07 CC4C). J.C.B. was supported in this work by the Alexander von Humboldt Foundation and the Australian Research Council (DP190100974).
PY - 2021/4/21
Y1 - 2021/4/21
N2 - 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 door to yet more sensitive searches for unknown forces and particles.
AB - 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 door to yet more sensitive searches for unknown forces and particles.
UR - http://www.scopus.com/inward/record.url?scp=85105081433&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.103.L040801
DO - 10.1103/PhysRevA.103.L040801
M3 - Article
AN - SCOPUS:85105081433
VL - 103
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 4
M1 - L040801
ER -