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Scalar interaction limits from the beta-ne correlation of trapped radioactive atoms

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Gorelov, A. Deutsch, Jules [UCL]

(eng) We have set limits on contributions of scalar interactions to nuclear beta decay. A magneto-optical trap (MOT) 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-neutrino correlation, in a more direct fashion than previously possible. The beta-neutrino correlation parameter of the 0+ to 0+ pure Fermi decay of 38mK is $\tilde{a}$=0.9981+-0.0030+-0.0037, consistent with the standard model prediction a=1. Comment: 4 pages, 3 figures, accepted by Phys. Rev. Lett., centroid changed

Document type Article de périodique (Journal article)
Publication date 2004
Journal information "Physical Review Letters" - Vol. 94, p. 142501 (2005)
Publisher American Physical Society
issn 0031-9007
e-issn 1079-7114
Publication status Publié
Affiliation UCL
Keywords Nuclear Experiment
Links
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Bibliographic reference Gorelov, A. ; Deutsch, Jules ; et. al. Scalar interaction limits from the beta-ne correlation of trapped radioactive atoms. In: Physical Review Letters, Vol. 94, p. 142501 (2005)
Permanent URL http://hdl.handle.net/2078/30876