Solution of the orthopositronium lifetime puzzle

The intrinsic decay rate of orthopositronium formed in SiO/sub 2/ powder is measured using the direct 2 gamma correction method such that the time dependence of the pick-off annihilation rate is precisely determined. The decay rate of orthopositronium is found to be 7.0396+or-0.0012(stat.)+or-0.0011...

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Detalles Bibliográficos
Autores principales: Asai, Shoji, Jinnouchi, Osamu, Kobayashi, T
Lenguaje:eng
Publicado: 2004
Materias:
Other Fields of Physics
Acceso en línea:https://dx.doi.org/10.1142/S0217751X0402018X
http://cds.cern.ch/record/914487
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author Asai, Shoji
Jinnouchi, Osamu
Kobayashi, T
author_facet Asai, Shoji
Jinnouchi, Osamu
Kobayashi, T
author_sort Asai, Shoji
collection CERN
description The intrinsic decay rate of orthopositronium formed in SiO/sub 2/ powder is measured using the direct 2 gamma correction method such that the time dependence of the pick-off annihilation rate is precisely determined. The decay rate of orthopositronium is found to be 7.0396+or-0.0012(stat.)+or-0.0011(sys.)/ mu s/sup -1/, which is consistent with our previous measurements with about twice the accuracy. Results agree well with the O( alpha /sup 2/) QED prediction, and also with a result reported very recently using nanoporous film.
id cern-914487
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2004
record_format invenio
spelling cern-9144872019-09-30T06:29:59Zdoi:10.1142/S0217751X0402018Xhttp://cds.cern.ch/record/914487engAsai, ShojiJinnouchi, OsamuKobayashi, TSolution of the orthopositronium lifetime puzzleOther Fields of PhysicsThe intrinsic decay rate of orthopositronium formed in SiO/sub 2/ powder is measured using the direct 2 gamma correction method such that the time dependence of the pick-off annihilation rate is precisely determined. The decay rate of orthopositronium is found to be 7.0396+or-0.0012(stat.)+or-0.0011(sys.)/ mu s/sup -1/, which is consistent with our previous measurements with about twice the accuracy. Results agree well with the O( alpha /sup 2/) QED prediction, and also with a result reported very recently using nanoporous film.oai:cds.cern.ch:9144872004
spellingShingle Other Fields of Physics
Asai, Shoji
Jinnouchi, Osamu
Kobayashi, T
Solution of the orthopositronium lifetime puzzle
title Solution of the orthopositronium lifetime puzzle
title_full Solution of the orthopositronium lifetime puzzle
title_fullStr Solution of the orthopositronium lifetime puzzle
title_full_unstemmed Solution of the orthopositronium lifetime puzzle
title_short Solution of the orthopositronium lifetime puzzle
title_sort solution of the orthopositronium lifetime puzzle
topic Other Fields of Physics
url https://dx.doi.org/10.1142/S0217751X0402018X
http://cds.cern.ch/record/914487
work_keys_str_mv AT asaishoji solutionoftheorthopositroniumlifetimepuzzle
AT jinnouchiosamu solutionoftheorthopositroniumlifetimepuzzle
AT kobayashit solutionoftheorthopositroniumlifetimepuzzle

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