Article
Physics, Multidisciplinary
Yevgeny Stadnik
Summary: Ultralight scalar dark matter may cause apparent oscillations in the muon mass, which can be directly detected through temporal shifts in the spectra of muonium and muonic atoms. Current datasets and ongoing spectroscopy measurements can test the interactions between scalar muons with a stringency up to 12 orders of magnitude higher than astrophysical limits. Ongoing free-fall experiments can probe forces associated with the exchange of virtual ultralight scalar bosons between muons and particles in the standard model, offering a sensitivity improvement of up to 5 orders of magnitude compared to laboratory and astrophysical limits.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Particles & Fields
Franziska Hagelstein, Vadim Lensky, Vladimir Pascalutsa
Summary: This article presents a study on the accurate evaluation of proton-structure effects, with a first calculation based on Baryon Chiral Perturbation Theory (B chi PT). The study predicts the effects of proton polarizability on hydrogen and muonic hydrogen, finding significant discrepancies with current data-driven evaluations. The study also suggests a smaller Zemach radius as a result of the small polarizability effect.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Multidisciplinary
Yang Fu, Xu Feng, Lu-Chang Jin, Chen-Fei Lu
Summary: In this study, a lattice QCD calculation method was developed to calculate the two-photon exchange contribution to the muonic-hydrogen Lamb shift. The calculated results were consistent with previous theoretical results in a range of 20-50 mu eV.
PHYSICAL REVIEW LETTERS
(2022)
Article
Astronomy & Astrophysics
Aldo Antognini, Yong-Hui Lin, Ulf -G. Meissner
Summary: We present a high-precision calculation method for the recoil-finite-size correction to the hyperfine splitting in muonic and electronic hydrogen, based on nucleon electromagnetic form factors obtained from dispersion theory. This method will aid in the upcoming searches for the hyperfine splitting transition in muonic hydrogen and provide an accurate determination of the sum of the polarizability and Zemach radius contributions when this transition is discovered.
Article
Multidisciplinary Sciences
A. Schneider, B. Sikora, S. Dickopf, M. Muller, N. S. Oreshkina, A. Rischka, I. A. Valuev, S. Ulmer, J. Walz, Z. Harman, C. H. Keitel, A. Mooser, K. Blaum
Summary: Helium-3 has become a significant candidate for research in various fields. In this study, the nuclear magnetic moment and hyperfine structure of He-3(+) were directly measured, providing a direct calibration for He-3 NMR probes and improving the precision of magnetometry by one order of magnitude. The measured values also enabled the determination of the Zemach radius with higher precision compared to previous results.
Article
Optics
Mohammad Haidar, Vladimir I. Korobov, Laurent Hilico, Jean -Philippe Karr
Summary: This study focuses on higher-order corrections to the spin-orbit and spin-spin tensor interactions in hydrogen molecular ions. The authors derive the m alpha 7ln(alpha)-order radiative correction using the NRQED framework. Complete numerical calculations, including the m alpha 6-order relativistic correction, are presented for the case of H-2(+). The theoretical uncertainty is significantly reduced compared to the Breit-Pauli level, to a few ppm. The results are also compared with available rf spectroscopy data.
Article
Astronomy & Astrophysics
Vadim Lensky, Franziska Hagelstein, Vladimir Pascalutsa
Summary: This study provides a systematic assessment of the nuclear contributions to the Lamb shift of muonic deuterium, including radiative corrections and higher-order corrections due to the single-nucleon structure. The findings reveal a correlation between the deuteron charge and Friar radii, and improve the theoretical description of the 2 gamma-exchange contribution, enhancing the agreement between theory and experiment.
Article
Optics
Michael Eides, Valery A. Shelyuto
Summary: We calculate the three-loop radiative corrections to energy levels in muonium and positronium, which arise from radiative corrections with polarization insertions in two-photon exchange diagrams. These corrections could be important for precise measurements of 1S-2S and 2S-2P transitions in muonium and positronium.
Article
Physics, Multidisciplinary
Gregory S. Adkins, Jonathan Gomprecht, Yanxi Li, Evan Shinn
Summary: We have calculated the pure-recoil corrections of order (Z alpha)6 for Coulombic bound states of two spin-1/2 fermions without approximation in the particle masses. Our results apply to systems with arbitrary mass ratios, including muonium, positronium, hydrogen, and muonic hydrogen (neglecting proton structure effects). We have also demonstrated a method for analytically computing the two-loop master integrals that occur in the relativistic region, and suggest that the same approach can be used for the calculation of three-loop integrals in order (Z alpha)7 corrections.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Mariano T. Colombo Jofre, Karol Koziol, I Agustin Aucar, Konstantin Gaul, Robert Berger, Gustavo A. Aucar
Summary: This article investigates the physics behind the indirect spin-spin coupling tensor J in systems containing mercury nuclei. By performing calculations, it is found that the paramagnetic-like mechanism contributes over 99.98% to the total coupling tensor value. The s-type valence atomic orbitals play a dominant role in describing the coupling. Through estimation, it is discovered that quantum electrodynamics effects result in corrections ranging from 0.7% to 1.7% of the total coupling constant.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Physics, Nuclear
Vadim Lensky, Franziska Hagelstein, Vladimir Pascalutsa
Summary: We present a study of the two-photon-exchange corrections to the S-levels in muonic and ordinary deuterium. The calculation is done within the pionless effective field theory and proceeds up to next-to-next-to-next-to-leading order in the expansion. Our findings suggest a larger elastic 2 γ-exchange contribution in muonic deuterium compared to other recent calculations. We also identify a correlation between the deuteron charge and Friar radii, which helps to assess the accuracy of a form factor parametrization. Higher-order 2 γ-exchange contributions are evaluated and their uncertainty is quantified using a Bayesian approach. The extracted deuteron charge radius from different observables is found to be in perfect agreement when taking into account the respective 2 γ-exchange effects.
EUROPEAN PHYSICAL JOURNAL A
(2022)
Article
Optics
Hubert Jozwiak, Hubert Cybulski, Piotr Wcislo
Summary: In this study, a theoretical investigation of hyperfine structure in rovibrational quadrupole transitions of the HD molecule's ground electronic state was conducted. The positions and intensities of numerous hyperfine components from different branches were determined. The results are crucial for interpreting experimental studies, testing quantum electrodynamics for molecules, and exploring new physics beyond the Standard Model.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2021)
Article
Astronomy & Astrophysics
J. Lozano, A. Agadjanov, J. Gegelia, U-G Meissner, A. Rusetsky
Summary: In this study, we calculate the spin-averaged amplitude for doubly virtual forward Compton scattering off nucleons in the framework of manifestly Lorentz-invariant baryon chiral perturbation theory at complete one-loop order O(p(4)), considering both infinite and finite volume cases. The obtained results allow for a detailed estimation of the finite-volume corrections to the amplitude, which can be extracted on the lattice using the background field technique.
Article
Optics
Hubert Jozwiak, Hubert Cybulski, Piotr Wcislo
Summary: This study reports the positions and intensities of hyperfine components in the HT and DT isotopologues of molecular hydrogen. The results are crucial for interpreting accurate measurements of rovibrational transition frequencies and for tests of quantum electrodynamics for molecules.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2021)
Article
Physics, Multidisciplinary
Pedro Amaro, A. Adamczak, M. Abdou Ahmed, L. Affolter, F. D. Amaro, Patricia Carvalho, T-L Chen, L. M. P. Fernandes, M. Ferro, D. Goeldi, T. Graf, M. Guerra, T. W. Haensch, C. A. O. Henriques, Y-C Huang, P. Indelicato, O. Kara, Klaus Kirch, Andreas Knecht, Franz Kottmann, Y-W Liu, Jorge Machado, M. Marszalek, R. D. P. Mano, C. M. B. Monteiro, F. Nez, J. Nuber, A. Ouf, N. Paul, Randolf Pohl, E. Rapisarda, J. M. F. dos Santos, J. P. Santos, P. A. O. C. Silva, L. Sinkunaite, J-T Shy, K. Schuhmann, S. Rajamohanan, Anna Soter, L. Sustelo, David Taqqu, L-B Wang, Frederik Wauters, P. Yzombard, M. Zeyen, Aldo Antognini
Summary: The CREMA collaboration aims to measure the ground-state hyperfine splitting in muonic hydrogen with high accuracy using pulsed laser spectroscopy. They calculate the combined probability of laser excitation to the triplet state followed by collisional-induced deexcitation back to the singlet state, taking into account decoherence effects and Doppler effects. These calculations help optimize the experimental conditions and define the requirements for the laser system.