Scalar interaction limits from the beta-ne correlation of trapped radioactive atoms
(2004) Physical Review Letters — Vol. 94, p. 142501 (2005)
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- (en) 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
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Gorelov, A., Deutsch, J., & et al. (2004). Scalar interaction limits from the beta-ne correlation of trapped radioactive atoms. Physical Review Letters, 94, 142501. https://doi.org/10.1103/PhysRevLett.94.142501 (Original work published 2005)