Article
Optics
Pauline Yzombard, Simon Thomas, Lucile Julien, Francois Biraben, Francois Nez
Summary: We investigate the 1S-3S two-photon transition of hydrogen and measure its frequency with a relative uncertainty of 9 x 10(-13). The measurement results contribute to resolving the proton puzzle but are inconsistent with those of other experiments. We also improve our setup to study the same measurement in deuterium and observe a broadened fluorescence signal due to stray accumulation of atoms in the vacuum chamber.
EUROPEAN PHYSICAL JOURNAL D
(2023)
Article
Instruments & Instrumentation
J. Pierce, J. Brock, C. Carlin, C. Keith, J. Maxwell, D. Meekins, X. Bai, A. Deur, D. Dutta, H. Gao, A. Gasparian, K. Gnanvo, C. Gu, D. Higinbotham, M. Khandaker, N. Liyanage, M. Meziane, E. Pasyuk, C. Peng, V. Punjabi, W. Xiong, X. Yan, L. Ye, Y. Zhang
Summary: The study presents a windowless, high-density, gas-flow target at Jefferson Lab, successfully achieving its design goal to accurately measure the root-mean-square charge radius of the proton. By eliminating scattering from the end caps of the target cell, the study permits a precise extraction of the proton charge radius.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2021)
Article
Multidisciplinary Sciences
H. Atac, M. Constantinou, Z-E Meziani, M. Paolone, N. Sparveris
Summary: The neutron, despite its zero-net electric charge, has a negative squared charge radius due to the asymmetric distribution of quarks. The precise measurement of its charge radius is crucial in understanding its structure. This study presents a new method for determining the charge radius of the neutron based on values of neutron electric form factors.
NATURE COMMUNICATIONS
(2021)
Review
Physics, Nuclear
Clara Peset, Antonio Pineda, Oleksandr Tomalak
Summary: This article reviews determinations of the electric proton charge radius from low-energy observables and explores its relationship with effective field theories. It provides a unified framework for dealing with low-energy constants associated with proton's electromagnetic interactions, and discusses the model dependence of analyses. The prospects of constructing effective field theories for lepton-proton scattering experiments are also explored.
PROGRESS IN PARTICLE AND NUCLEAR PHYSICS
(2021)
Article
Astronomy & Astrophysics
C. Alexandrou, S. Bacchio, M. Constantinou, P. Dimopoulos, J. Finkenrath, K. Hadjiyiannakou, K. Jansen, G. Koutsou, B. Kostrzewa, T. Leontiou, C. Urbach
Summary: The nucleon axial and induced pseudoscalar form factors are computed using three ensembles of gauge configurations, one of which includes strange and charm quarks. The latter ensemble with finer lattice spacing and larger statistics is used for final results, while the other two are used to assess volume effects. The momentum dependence of these form factors and their relations based on pion pole dominance and the partially conserved axial-vector current hypothesis are examined.
Article
Astronomy & Astrophysics
D. Djukanovic, T. Harris, G. von Hippel, P. M. Junnarkar, H. B. Meyer, D. Mohler, K. Ottnad, T. Schulz, J. Wilhelm, H. Wittig
Summary: In this study, the isovector electromagnetic form factors of the nucleon were computed using lattice simulations, showing agreement with experimental values and employing various methods to remove bias from excited-state contributions. The estimates for the nucleon magnetic moment and square radius are consistent with experimental measurements.
Article
Physics, Particles & Fields
A. Rafiei, Z. Rezaei, A. Mirjalili
Summary: This paper investigates the effect of noncommutative spacetime on electron-proton elastic scattering and explores the physical meaning of form factors. The results show that using the polarization method in noncommutative spacetime can yield the same ratio of electric form factor to magnetic form factor as in normal spacetime, confirming the superiority of the polarization method in experimental measurements. Additionally, the pure noncommutative effect leads to the appearance of an extra ratio.
EUROPEAN PHYSICAL JOURNAL C
(2022)
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.
Article
Astronomy & Astrophysics
Bing Yan, Cheng Chen, Ju-Jun Xie
Summary: We propose a phenomenological extended vector meson dominance model that well describes the experimental data on the E and F-electromagnetic form factors in the timelike region. We also reproduce the ratios of the total cross sections of reactions e+e- -> E+E over bar -, E0E over bar 0, and E-E over bar +, achieving agreement with the experimental data. Furthermore, we analytically continue the expression of the form factors to the spacelike region and estimate the charge radii of the E and F-hyperons, obtaining agreement with experimental data for the charge radius of E-.
Review
Astronomy & Astrophysics
Weizhi Xiong, Chao Peng
Summary: A proton is a bound state of strong interaction governed by Quantum Chromodynamics (QCD), and its electric charge radius is important for Quantum Electrodynamic (QED) calculations. However, there has been a discrepancy between measurements of proton charge radius from different methods. This review focuses on lepton-scattering measurements of proton charge radius, recent theoretical and experimental advancements, and future experiments in this field.
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
Multidisciplinary Sciences
Eugene Oks
Summary: Precise knowledge of the proton charge radius rp is important for both quantum chromodynamics and atomic physics. However, there has been controversy and ambiguity in measuring rp for over a dozen of years. Our research highlights the importance of considering the flavor symmetry of electronic hydrogen atoms in rp measurements.
Article
Chemistry, Multidisciplinary
Xingpin Li, Xiangyu Jia, Amiel S. P. Paz, Yuquan Cao, William J. Glover
Summary: This study used time-dependent density functional theory to simulate the X-ray absorption spectrum of the hydrated electron. A unique peak at 533 eV was observed, in agreement with recent experiments, and assigned to transitions from water O1s to the singly occupied molecular orbital (SOMO). The transitions acquired oscillator strength due to a mixing of a cavity-localized orbital and water antibonding orbitals.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(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
Physics, Multidisciplinary
A. L. Kholmetskii, T. Yarman, O. V. Missevitch
Summary: This paper proposes a new definition of the momentum operator in quantum physics, which combines mechanical and electromagnetic momenta for charged particles in an electromagnetic field. This new definition accurately describes the quantum phase effects for charges and dipoles. The theoretical analysis and experimental data support the effectiveness of this redefined momentum operator in describing precise atomic physics problems.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Chemistry, Multidisciplinary
Sandrine Galtier, Helene Fleurbaey, Simon Thomas, Lucile Julien, Francois Biraben, Francois Nez
JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA
(2015)
Article
Instruments & Instrumentation
Marc Diepold, Luis M. P. Fernandes, Jorge Machado, Pedro Amaro, Marwan Abdou-Ahmed, Fernando D. Amaro, Aldo Antognini, Francois Biraben, Tzu-Ling Chen, Daniel S. Covita, Andreas J. Dax, Beatrice Franke, Sandrine Galtier, Andrea L. Gouvea, Johannes Goetzfried, Thomas Graf, Theodor W. Haensch, Malte Hildebrandt, Paul Indelicato, Lucile Julien, Klaus Kirch, Andreas Knecht, Franz Kottmann, Julian J. Krauth, Yi-Wei Liu, Cristina M. B. Monteiro, Francoise Mulhauser, Boris Naar, Tobias Nebel, Francois Nez, Jose Paulo Santos, Joaquim M. F. dos Santos, Karsten Schuhmann, Csilla I. Szabo, David Taqqu, Joao F. C. A. Veloso, Andreas Voss, Birgit Weichelt, Randolf Pohl
REVIEW OF SCIENTIFIC INSTRUMENTS
(2015)
Article
Optics
Sandrine Galtier, Robert K. Altmann, Laura S. Dreissen, Kjeld S. E. Eikema
APPLIED PHYSICS B-LASERS AND OPTICS
(2017)
Article
Physics, Multidisciplinary
R. K. Altmann, S. Galtier, L. S. Dreissen, K. S. E. Eikema
PHYSICAL REVIEW LETTERS
(2016)
Article
Physics, Atomic, Molecular & Chemical
Sandrine Galtier, Christophe Anselmo, Jean-Yves Welschinger, J. F. Sivignon, Jean-Pierre Cariou, Alain Miffre, Patrick Rairoux
JOURNAL OF MOLECULAR SPECTROSCOPY
(2018)
Article
Optics
Sandrine Galtier, Francois Nez, Lucile Julien, Francois Biraben
OPTICS COMMUNICATIONS
(2014)
Article
Physics, Multidisciplinary
Simon Thomas, Helene Fleurbaey, Sandrine Galtier, Lucile Julien, Francois Biraben, Francois Nez
ANNALEN DER PHYSIK
(2019)
Article
Environmental Sciences
Sandrine Galtier, Clement Pivard, Patrick Rairoux
