Asymmetry parameter for the nonmesonic decay of 5LHe

Asymmetry parameter for the nonmesonic decay of 5LHe

We report the preliminary result of an exact calculation of the asymmetry parameter, alambda, in the nonmesonic hypernuclear decay, based on a one-meson-exchange (OME) model. For the case of <IMG SRC="/img/revistas/bjp/v34n3a/a30img02.gif">He and including one-pion-exchange only, the result is shown not to differ considerably from the one obtained with the approximate formula widely used in the literature. In particular, the sign of alambda remains negative, in disagreement with its most recent experimental determination. Whether these facts remain true for heavier hypernuclei and in a more complete OME model is still under investigation.

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Main Authors: Barbero,Cesar, Galeão,Alfredo Pio, Krmpoti,Francisco
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Física 2004
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000500030
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spelling oai:scielo:S0103-973320040005000302004-10-26Asymmetry parameter for the nonmesonic decay of 5LHeBarbero,CesarGaleão,Alfredo PioKrmpoti,FranciscoWe report the preliminary result of an exact calculation of the asymmetry parameter, alambda, in the nonmesonic hypernuclear decay, based on a one-meson-exchange (OME) model. For the case of <IMG SRC="/img/revistas/bjp/v34n3a/a30img02.gif">He and including one-pion-exchange only, the result is shown not to differ considerably from the one obtained with the approximate formula widely used in the literature. In particular, the sign of alambda remains negative, in disagreement with its most recent experimental determination. Whether these facts remain true for heavier hypernuclei and in a more complete OME model is still under investigation.info:eu-repo/semantics/openAccessSociedade Brasileira de FísicaBrazilian Journal of Physics v.34 n.3a 20042004-09-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000500030en10.1590/S0103-97332004000500030
institution SCIELO
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Barbero,Cesar
Galeão,Alfredo Pio
Krmpoti,Francisco
spellingShingle Barbero,Cesar
Galeão,Alfredo Pio
Krmpoti,Francisco
Asymmetry parameter for the nonmesonic decay of 5LHe
author_facet Barbero,Cesar
Galeão,Alfredo Pio
Krmpoti,Francisco
author_sort Barbero,Cesar
title Asymmetry parameter for the nonmesonic decay of 5LHe
title_short Asymmetry parameter for the nonmesonic decay of 5LHe
title_full Asymmetry parameter for the nonmesonic decay of 5LHe
title_fullStr Asymmetry parameter for the nonmesonic decay of 5LHe
title_full_unstemmed Asymmetry parameter for the nonmesonic decay of 5LHe
title_sort asymmetry parameter for the nonmesonic decay of 5lhe
description We report the preliminary result of an exact calculation of the asymmetry parameter, alambda, in the nonmesonic hypernuclear decay, based on a one-meson-exchange (OME) model. For the case of <IMG SRC="/img/revistas/bjp/v34n3a/a30img02.gif">He and including one-pion-exchange only, the result is shown not to differ considerably from the one obtained with the approximate formula widely used in the literature. In particular, the sign of alambda remains negative, in disagreement with its most recent experimental determination. Whether these facts remain true for heavier hypernuclei and in a more complete OME model is still under investigation.
publisher Sociedade Brasileira de Física
publishDate 2004
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000500030
work_keys_str_mv AT barberocesar asymmetryparameterforthenonmesonicdecayof5lhe
AT galeaoalfredopio asymmetryparameterforthenonmesonicdecayof5lhe
AT krmpotifrancisco asymmetryparameterforthenonmesonicdecayof5lhe
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