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New experimental limits on heavy neutrino mixing in 8B- decay obtained with the BOREXINO counting test facility

Abstract : If heavy neutrinos with mass mH 2me are emitted in the decays of 8B in the Sun, then H L + e+ + e- decays should be observed. In the present work, the results of background measurements with the Borexino Counting Test Facility have been used to obtain bounds on the number of these decays. As a result, new limits on the coupling |UeH|2 of a massive neutrino in the range of 1.1 MeV to 12 MeV have been derived (|UeH|2 10-3-10-5). The obtained limits on the mixing parameter are stronger than obtained in previous experiments using nuclear reactors and accelerators.
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http://hal.in2p3.fr/in2p3-00022120
Contributor : Simone Lantz Connect in order to contact the contributor
Submitted on : Tuesday, July 20, 2004 - 12:12:34 PM
Last modification on : Wednesday, September 23, 2020 - 4:32:36 AM

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  • HAL Id : in2p3-00022120, version 1

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PCC | CNRS | IN2P3 | CDF | PSL

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H.O. Back, M. Balata, A. de Bari, T. Beau, A. de Bellefon, et al.. New experimental limits on heavy neutrino mixing in 8B- decay obtained with the BOREXINO counting test facility. JETP Letters, Springer Verlag, 2003, 78, pp.261-266. ⟨in2p3-00022120⟩

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