Cargando…
Measuring the α-particle charge radius with muonic helium-4 ions
The energy levels of hydrogen-like atomic systems can be calculated with great precision. Starting from their quantum mechanical solution, they have been refined over the years to include the electron spin, the relativistic and quantum field effects, and tiny energy shifts related to the complex str...
Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7914124/ https://www.ncbi.nlm.nih.gov/pubmed/33505036 http://dx.doi.org/10.1038/s41586-021-03183-1 |
_version_ | 1783656962266759168 |
---|---|
author | Krauth, Julian J. Schuhmann, Karsten Ahmed, Marwan Abdou Amaro, Fernando D. Amaro, Pedro Biraben, François Chen, Tzu-Ling Covita, Daniel S. Dax, Andreas J. Diepold, Marc Fernandes, Luis M. P. Franke, Beatrice Galtier, Sandrine Gouvea, Andrea L. Götzfried, Johannes Graf, Thomas Hänsch, Theodor W. Hartmann, Jens Hildebrandt, Malte Indelicato, Paul Julien, Lucile Kirch, Klaus Knecht, Andreas Liu, Yi-Wei Machado, Jorge Monteiro, Cristina M. B. Mulhauser, Françoise Naar, Boris Nebel, Tobias Nez, François dos Santos, Joaquim M. F. Santos, José Paulo Szabo, Csilla I. Taqqu, David Veloso, João F. C. A. Vogelsang, Jan Voss, Andreas Weichelt, Birgit Pohl, Randolf Antognini, Aldo Kottmann, Franz |
author_facet | Krauth, Julian J. Schuhmann, Karsten Ahmed, Marwan Abdou Amaro, Fernando D. Amaro, Pedro Biraben, François Chen, Tzu-Ling Covita, Daniel S. Dax, Andreas J. Diepold, Marc Fernandes, Luis M. P. Franke, Beatrice Galtier, Sandrine Gouvea, Andrea L. Götzfried, Johannes Graf, Thomas Hänsch, Theodor W. Hartmann, Jens Hildebrandt, Malte Indelicato, Paul Julien, Lucile Kirch, Klaus Knecht, Andreas Liu, Yi-Wei Machado, Jorge Monteiro, Cristina M. B. Mulhauser, Françoise Naar, Boris Nebel, Tobias Nez, François dos Santos, Joaquim M. F. Santos, José Paulo Szabo, Csilla I. Taqqu, David Veloso, João F. C. A. Vogelsang, Jan Voss, Andreas Weichelt, Birgit Pohl, Randolf Antognini, Aldo Kottmann, Franz |
author_sort | Krauth, Julian J. |
collection | PubMed |
description | The energy levels of hydrogen-like atomic systems can be calculated with great precision. Starting from their quantum mechanical solution, they have been refined over the years to include the electron spin, the relativistic and quantum field effects, and tiny energy shifts related to the complex structure of the nucleus. These energy shifts caused by the nuclear structure are vastly magnified in hydrogen-like systems formed by a negative muon and a nucleus, so spectroscopy of these muonic ions can be used to investigate the nuclear structure with high precision. Here we present the measurement of two 2S–2P transitions in the muonic helium-4 ion that yields a precise determination of the root-mean-square charge radius of the α particle of 1.67824(83) femtometres. This determination from atomic spectroscopy is in excellent agreement with the value from electron scattering(1), but a factor of 4.8 more precise, providing a benchmark for few-nucleon theories, lattice quantum chromodynamics and electron scattering. This agreement also constrains several beyond-standard-model theories proposed to explain the proton-radius puzzle(2–5), in line with recent determinations of the proton charge radius(6–9), and establishes spectroscopy of light muonic atoms and ions as a precise tool for studies of nuclear properties. |
format | Online Article Text |
id | pubmed-7914124 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-79141242021-03-15 Measuring the α-particle charge radius with muonic helium-4 ions Krauth, Julian J. Schuhmann, Karsten Ahmed, Marwan Abdou Amaro, Fernando D. Amaro, Pedro Biraben, François Chen, Tzu-Ling Covita, Daniel S. Dax, Andreas J. Diepold, Marc Fernandes, Luis M. P. Franke, Beatrice Galtier, Sandrine Gouvea, Andrea L. Götzfried, Johannes Graf, Thomas Hänsch, Theodor W. Hartmann, Jens Hildebrandt, Malte Indelicato, Paul Julien, Lucile Kirch, Klaus Knecht, Andreas Liu, Yi-Wei Machado, Jorge Monteiro, Cristina M. B. Mulhauser, Françoise Naar, Boris Nebel, Tobias Nez, François dos Santos, Joaquim M. F. Santos, José Paulo Szabo, Csilla I. Taqqu, David Veloso, João F. C. A. Vogelsang, Jan Voss, Andreas Weichelt, Birgit Pohl, Randolf Antognini, Aldo Kottmann, Franz Nature Article The energy levels of hydrogen-like atomic systems can be calculated with great precision. Starting from their quantum mechanical solution, they have been refined over the years to include the electron spin, the relativistic and quantum field effects, and tiny energy shifts related to the complex structure of the nucleus. These energy shifts caused by the nuclear structure are vastly magnified in hydrogen-like systems formed by a negative muon and a nucleus, so spectroscopy of these muonic ions can be used to investigate the nuclear structure with high precision. Here we present the measurement of two 2S–2P transitions in the muonic helium-4 ion that yields a precise determination of the root-mean-square charge radius of the α particle of 1.67824(83) femtometres. This determination from atomic spectroscopy is in excellent agreement with the value from electron scattering(1), but a factor of 4.8 more precise, providing a benchmark for few-nucleon theories, lattice quantum chromodynamics and electron scattering. This agreement also constrains several beyond-standard-model theories proposed to explain the proton-radius puzzle(2–5), in line with recent determinations of the proton charge radius(6–9), and establishes spectroscopy of light muonic atoms and ions as a precise tool for studies of nuclear properties. Nature Publishing Group UK 2021-01-27 2021 /pmc/articles/PMC7914124/ /pubmed/33505036 http://dx.doi.org/10.1038/s41586-021-03183-1 Text en © The Authors(s) 2021, corrected publication 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Krauth, Julian J. Schuhmann, Karsten Ahmed, Marwan Abdou Amaro, Fernando D. Amaro, Pedro Biraben, François Chen, Tzu-Ling Covita, Daniel S. Dax, Andreas J. Diepold, Marc Fernandes, Luis M. P. Franke, Beatrice Galtier, Sandrine Gouvea, Andrea L. Götzfried, Johannes Graf, Thomas Hänsch, Theodor W. Hartmann, Jens Hildebrandt, Malte Indelicato, Paul Julien, Lucile Kirch, Klaus Knecht, Andreas Liu, Yi-Wei Machado, Jorge Monteiro, Cristina M. B. Mulhauser, Françoise Naar, Boris Nebel, Tobias Nez, François dos Santos, Joaquim M. F. Santos, José Paulo Szabo, Csilla I. Taqqu, David Veloso, João F. C. A. Vogelsang, Jan Voss, Andreas Weichelt, Birgit Pohl, Randolf Antognini, Aldo Kottmann, Franz Measuring the α-particle charge radius with muonic helium-4 ions |
title | Measuring the α-particle charge radius with muonic helium-4 ions |
title_full | Measuring the α-particle charge radius with muonic helium-4 ions |
title_fullStr | Measuring the α-particle charge radius with muonic helium-4 ions |
title_full_unstemmed | Measuring the α-particle charge radius with muonic helium-4 ions |
title_short | Measuring the α-particle charge radius with muonic helium-4 ions |
title_sort | measuring the α-particle charge radius with muonic helium-4 ions |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7914124/ https://www.ncbi.nlm.nih.gov/pubmed/33505036 http://dx.doi.org/10.1038/s41586-021-03183-1 |
work_keys_str_mv | AT krauthjulianj measuringtheaparticlechargeradiuswithmuonichelium4ions AT schuhmannkarsten measuringtheaparticlechargeradiuswithmuonichelium4ions AT ahmedmarwanabdou measuringtheaparticlechargeradiuswithmuonichelium4ions AT amarofernandod measuringtheaparticlechargeradiuswithmuonichelium4ions AT amaropedro measuringtheaparticlechargeradiuswithmuonichelium4ions AT birabenfrancois measuringtheaparticlechargeradiuswithmuonichelium4ions AT chentzuling measuringtheaparticlechargeradiuswithmuonichelium4ions AT covitadaniels measuringtheaparticlechargeradiuswithmuonichelium4ions AT daxandreasj measuringtheaparticlechargeradiuswithmuonichelium4ions AT diepoldmarc measuringtheaparticlechargeradiuswithmuonichelium4ions AT fernandesluismp measuringtheaparticlechargeradiuswithmuonichelium4ions AT frankebeatrice measuringtheaparticlechargeradiuswithmuonichelium4ions AT galtiersandrine measuringtheaparticlechargeradiuswithmuonichelium4ions AT gouveaandreal measuringtheaparticlechargeradiuswithmuonichelium4ions AT gotzfriedjohannes measuringtheaparticlechargeradiuswithmuonichelium4ions AT grafthomas measuringtheaparticlechargeradiuswithmuonichelium4ions AT hanschtheodorw measuringtheaparticlechargeradiuswithmuonichelium4ions AT hartmannjens measuringtheaparticlechargeradiuswithmuonichelium4ions AT hildebrandtmalte measuringtheaparticlechargeradiuswithmuonichelium4ions AT indelicatopaul measuringtheaparticlechargeradiuswithmuonichelium4ions AT julienlucile measuringtheaparticlechargeradiuswithmuonichelium4ions AT kirchklaus measuringtheaparticlechargeradiuswithmuonichelium4ions AT knechtandreas measuringtheaparticlechargeradiuswithmuonichelium4ions AT liuyiwei measuringtheaparticlechargeradiuswithmuonichelium4ions AT machadojorge measuringtheaparticlechargeradiuswithmuonichelium4ions AT monteirocristinamb measuringtheaparticlechargeradiuswithmuonichelium4ions AT mulhauserfrancoise measuringtheaparticlechargeradiuswithmuonichelium4ions AT naarboris measuringtheaparticlechargeradiuswithmuonichelium4ions AT nebeltobias measuringtheaparticlechargeradiuswithmuonichelium4ions AT nezfrancois measuringtheaparticlechargeradiuswithmuonichelium4ions AT dossantosjoaquimmf measuringtheaparticlechargeradiuswithmuonichelium4ions AT santosjosepaulo measuringtheaparticlechargeradiuswithmuonichelium4ions AT szabocsillai measuringtheaparticlechargeradiuswithmuonichelium4ions AT taqqudavid measuringtheaparticlechargeradiuswithmuonichelium4ions AT velosojoaofca measuringtheaparticlechargeradiuswithmuonichelium4ions AT vogelsangjan measuringtheaparticlechargeradiuswithmuonichelium4ions AT vossandreas measuringtheaparticlechargeradiuswithmuonichelium4ions AT weicheltbirgit measuringtheaparticlechargeradiuswithmuonichelium4ions AT pohlrandolf measuringtheaparticlechargeradiuswithmuonichelium4ions AT antogninialdo measuringtheaparticlechargeradiuswithmuonichelium4ions AT kottmannfranz measuringtheaparticlechargeradiuswithmuonichelium4ions |