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26 April 2024

» pubmed » pmid15904059

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Scalar interaction limits from the beta-nu correlation of trapped radioactive atoms
A Gorelov ; D Melconian ; W P Alford ; D Ashery ; G Ball ; J A Behr ; P G Bricault ; J M D’Auria ; J Deutsch ; J Dilling ; M Dombsky ; P Dubé ; J Fingler ; U Giesen ; F Glück ; S Gu ; O Häusser ; K P Jackson ; B K Jennings ; M R Pearson ; T J Stocki ; T B Swanson ; M Trinczek ;
Date:	15 Apr 2005
Journal:	Phys Rev Lett, 94 (14), 142501
Abstract:	We have set limits on contributions of scalar interactions to nuclear beta decay. A magneto-optical trap provides a localized source of atoms suspended in space, so the low-energy recoiling nuclei can freely escape and be detected in coincidence with the beta. This allows reconstruction of the neutrino momentum, and the measurement of the beta-nu correlation, in a more direct fashion than previously possible. The beta-nu correlation parameter of the 0(+)-->0(+) pure Fermi decay of (38)K(m) is a =0.9981+/-0.0030+0.0032 / -0.0037, consistent with the standard model prediction a =1.
Source:	PubMed, pmid15904059
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