Zobrazeno 1 - 10
of 150
pro vyhledávání: '"Harman, Zoltán"'
The two-loop self-energy correction to the bound-electron $g$-factor in hydrogenlike ions is investigated, taking into account the electron-nucleus interaction exactly. This all-order calculation is required to improve the total theoretical uncertain
Externí odkaz:
http://arxiv.org/abs/2410.10421
Autor:
Dickopf, Stefan, Sikora, Bastian, Kaiser, Annabelle, Müller, Marius, Ulmer, Stefan, Yerokhin, Vladimir A., Harman, Zoltán, Keitel, Christoph H., Mooser, Andreas, Blaum, Klaus
Publikováno v:
Nature 632, 757-761 (2024)
Many powerful tests of the Standard Model of particle physics and searches for new physics with precision atomic spectroscopy are plagued by our lack of knowledge of nuclear properties. Ideally, such properties may be derived from precise measurement
Externí odkaz:
http://arxiv.org/abs/2409.06306
Autor:
Door, Menno, Yeh, Chih-Han, Heinz, Matthias, Kirk, Fiona, Lyu, Chunhai, Miyagi, Takayuki, Berengut, Julian C., Bieroń, Jacek, Blaum, Klaus, Dreissen, Laura S., Eliseev, Sergey, Filianin, Pavel, Filzinger, Melina, Fuchs, Elina, Fürst, Henning A., Gaigalas, Gediminas, Harman, Zoltán, Herkenhoff, Jost, Huntemann, Nils, Keitel, Christoph H., Kromer, Kathrin, Lange, Daniel, Rischka, Alexander, Schweiger, Christoph, Schwenk, Achim, Shimizu, Noritaka, Mehlstäubler, Tanja E.
The Standard Model of particle physics describes the properties of elementary particles and their interactions remarkably well, but in particular does not account for dark matter. Isotope-shift spectroscopy is a sensitive probe of fifth forces and ne
Externí odkaz:
http://arxiv.org/abs/2403.07792
Publikováno v:
Phys. Rev. A 109, 032808 (2024)
Ab initio QED calculations of the nuclear magnetic shielding constant in helium-like ions are presented. We combine the nonrelativistic QED approach based on an expansion in powers of the fine-structure constant $\alpha$ and the so-called ``all-order
Externí odkaz:
http://arxiv.org/abs/2403.06582
Autor:
Schweiger, Christoph, Braß, Martin, Debierre, Vincent, Door, Menno, Dorrer, Holger, Düllmann, Christoph E., Enss, Christian, Filianin, Pavel, Gastaldo, Loredana, Harman, Zoltán, Haverkort, Maurits W., Herkenhoff, Jost, Indelicato, Paul, Keitel, Christoph H., Kromer, Kathrin, Lange, Daniel, Novikov, Yuri N., Renisch, Dennis, Rischka, Alexander, Schüssler, Rima X., Eliseev, Sergey, Blaum, Klaus
The investigation of the absolute scale of the effective neutrino mass remains challenging due to the exclusively weak interaction of neutrinos with all known particles in the standard model of particle physics. Currently, the most precise and least
Externí odkaz:
http://arxiv.org/abs/2402.06464
Autor:
Kromer, Kathrin, Lyu, Chunhai, Bieroń, Jacek, Door, Menno, Enzmann, Lucia, Filianin, Pavel, Gaigalas, Gediminas, Harman, Zoltán, Herkenhoff, Jost, Huang, Wenjia, Keitel, Christoph H., Eliseev, Sergey, Blaum, Klaus
The atomic mass of uranium-238 has been determined to be $238.050\,787\,618(15)\,\text{u}$, improving the literature uncertainty by two orders of magnitude. It is obtained from a measurement of the mass ratio of $^{238}$U$^{47+}$ and $^{132}$Xe$^{26+
Externí odkaz:
http://arxiv.org/abs/2312.17041
Autor:
Kromer, Kathrin, Lyu, Chunhai, Door, Menno, Filianin, Pavel, Harman, Zoltán, Herkenhoff, Jost, Indelicato, Paul, Keitel, Christoph H., Lange, Daniel, Novikov, Yuri N., Schweiger, Christoph, Eliseev, Sergey, Blaum, Klaus
Highly charged ions (HCIs) offer many opportunities for next-generation clock research due to the vast landscape of available electronic transitions in different charge states. The development of XUV frequency combs has enabled the search for clock t
Externí odkaz:
http://arxiv.org/abs/2310.19365
Autor:
Banerjee, Sreya, Harman, Zoltán
Self-energy corrections to the energy levels of bound electrons are calculated in the framework of path integrals. We arrive at the full fermion propagator, using methods of functional integrals, in the form of Schwinger-Dyson equation (SDE). From th
Externí odkaz:
http://arxiv.org/abs/2309.15590
Autor:
Banerjee, Sreya, Harman, Zoltán
Vacuum polarization corrections to the energy levels of bound electrons are calculated using a perturbative path integral formalism. We apply quantum electrodynamics in a framework which treats the strong binding nuclear field to all orders. The effe
Externí odkaz:
http://arxiv.org/abs/2309.13739
Autor:
Banerjee, Sreya, Harman, Zoltán
The relativistic Green's function of a free spin-1/2 fermion is derived using the Feynman path integral formalism in spherical coordinates. The Green's function is reduced to an exactly solvable path integral by an appropriate coordinate transformati
Externí odkaz:
http://arxiv.org/abs/2309.13688