Spectroscopy of antiprotonic helium atoms and its contribution to the fundamental physical constants

Antiprotonic helium atom, a metastable neutral system consisting of an antiproton, an electron and a helium nucleus, was serendipitously discovered, and has been studied at CERN’s antiproton decelerator facility. Its transition frequencies have recently been measured to nine digits of precision by l...

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Detalles Bibliográficos
Autor principal: Hayano, Ryugo S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Japan Academy 2010
Materias:
Review
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3417566/
https://www.ncbi.nlm.nih.gov/pubmed/20075605
http://dx.doi.org/10.2183/pjab.86.1
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author Hayano, Ryugo S.
author_facet Hayano, Ryugo S.
author_sort Hayano, Ryugo S.
collection PubMed
description Antiprotonic helium atom, a metastable neutral system consisting of an antiproton, an electron and a helium nucleus, was serendipitously discovered, and has been studied at CERN’s antiproton decelerator facility. Its transition frequencies have recently been measured to nine digits of precision by laser spectroscopy. By comparing these experimental results with three-body QED calculations, the antiproton-to-electron massratio was determined as 1836.152674(5). This result contributed to the CODATA recommended values of the fundamental physical constants.
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spelling pubmed-34175662012-11-27 Spectroscopy of antiprotonic helium atoms and its contribution to the fundamental physical constants Hayano, Ryugo S. Proc Jpn Acad Ser B Phys Biol Sci Review Antiprotonic helium atom, a metastable neutral system consisting of an antiproton, an electron and a helium nucleus, was serendipitously discovered, and has been studied at CERN’s antiproton decelerator facility. Its transition frequencies have recently been measured to nine digits of precision by laser spectroscopy. By comparing these experimental results with three-body QED calculations, the antiproton-to-electron massratio was determined as 1836.152674(5). This result contributed to the CODATA recommended values of the fundamental physical constants. The Japan Academy 2010-01 /pmc/articles/PMC3417566/ /pubmed/20075605 http://dx.doi.org/10.2183/pjab.86.1 Text en © 2010 The Japan Academy This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Review
Hayano, Ryugo S.
Spectroscopy of antiprotonic helium atoms and its contribution to the fundamental physical constants
title Spectroscopy of antiprotonic helium atoms and its contribution to the fundamental physical constants
title_full Spectroscopy of antiprotonic helium atoms and its contribution to the fundamental physical constants
title_fullStr Spectroscopy of antiprotonic helium atoms and its contribution to the fundamental physical constants
title_full_unstemmed Spectroscopy of antiprotonic helium atoms and its contribution to the fundamental physical constants
title_short Spectroscopy of antiprotonic helium atoms and its contribution to the fundamental physical constants
title_sort spectroscopy of antiprotonic helium atoms and its contribution to the fundamental physical constants
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3417566/
https://www.ncbi.nlm.nih.gov/pubmed/20075605
http://dx.doi.org/10.2183/pjab.86.1
work_keys_str_mv AT hayanoryugos spectroscopyofantiprotonicheliumatomsanditscontributiontothefundamentalphysicalconstants

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