High-precision Penning-trap spectroscopy of the ground-state spin structure of HD+
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arXiv
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| Autori principali: | , , , , , , , , , , , , |
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| Natura: | Preprint |
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2026
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| _version_ | 1866908841187213312 |
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| author | König, Charlotte M. Bohman, Matthew Heiße, Fabian Morgner, Jonathan Sailer, Tim Tu, Bingsheng Blaum, Klaus Sturm, Sven Bakalov, Dimitar Nogueira, Hugo D. Karr, Jean-Philippe Kullie, Ossama Schiller, Stephan |
| author_facet | König, Charlotte M. Bohman, Matthew Heiße, Fabian Morgner, Jonathan Sailer, Tim Tu, Bingsheng Blaum, Klaus Sturm, Sven Bakalov, Dimitar Nogueira, Hugo D. Karr, Jean-Philippe Kullie, Ossama Schiller, Stephan |
| contents | We present high-precision spectroscopy of the ground-state hyperfine structure of HD$^+$ at 4~T. We determine
the bound-electron $g$ factor, $g_{e,\mathrm{bound}} = -2.002\,278\,540\,96(40)$, to a relative uncertainty of $2\times$10$^{-10}$, the most precise determination of a bound-electron $g$ factor of a molecular ion to date. The experimental value agrees with recently developed ab initio theory that now includes quantum-electrodynamical effects up to order $α^5$ and has reduced the theoretical uncertainty by three orders of magnitude [O. Kullie \textit{et al.}, Phys. Rev. A 112 052813 (2025)]. In addition, we extract the scalar spin-spin interaction coefficients $E_4$~=~925\,395.758(41)$\,$kHz (electron-proton) and $E_5$~=~142\,287.821(22)$\,$kHz (electron-deuteron), which show a moderate tension with another state-of-the-art theoretical prediction [M. Haidar \textit{et al.}, Phys. Rev. A 106 042815 (2022)]. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_17522 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | High-precision Penning-trap spectroscopy of the ground-state spin structure of HD+ König, Charlotte M. Bohman, Matthew Heiße, Fabian Morgner, Jonathan Sailer, Tim Tu, Bingsheng Blaum, Klaus Sturm, Sven Bakalov, Dimitar Nogueira, Hugo D. Karr, Jean-Philippe Kullie, Ossama Schiller, Stephan Atomic Physics We present high-precision spectroscopy of the ground-state hyperfine structure of HD$^+$ at 4~T. We determine the bound-electron $g$ factor, $g_{e,\mathrm{bound}} = -2.002\,278\,540\,96(40)$, to a relative uncertainty of $2\times$10$^{-10}$, the most precise determination of a bound-electron $g$ factor of a molecular ion to date. The experimental value agrees with recently developed ab initio theory that now includes quantum-electrodynamical effects up to order $α^5$ and has reduced the theoretical uncertainty by three orders of magnitude [O. Kullie \textit{et al.}, Phys. Rev. A 112 052813 (2025)]. In addition, we extract the scalar spin-spin interaction coefficients $E_4$~=~925\,395.758(41)$\,$kHz (electron-proton) and $E_5$~=~142\,287.821(22)$\,$kHz (electron-deuteron), which show a moderate tension with another state-of-the-art theoretical prediction [M. Haidar \textit{et al.}, Phys. Rev. A 106 042815 (2022)]. |
| title | High-precision Penning-trap spectroscopy of the ground-state spin structure of HD+ |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2602.17522 |