An experiment for the measurement of the bound-beta decay of the free neutron

Details An experiment for the measurement of the bound-beta decay of the free neutron An experiment for the measurement of the bound-beta decay of the free neutron

2006-02-26

arxiv.org/abs/hep-ex/0602047v1

Eur.Phys.J. A30 (2006) 603-611

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages, 5 figures. Submitted to EPJ C

Scientific paper

The hyperfine-state population of hydrogen after the bound-beta decay of the neutron directly yields the neutrino left-handedness or a possible right-handed admixture and possible small scalar and tensor contributions to the weak force. Using the through-going beam tube of a high-flux reactor, a background free hydrogen rate of ca. 3 s$^{-1}$ can be obtained. The detection of the neutral hydrogen atoms and the analysis of the hyperfine states is accomplished by Lamb shift source type quenching and subsequent ionization. The constraints on the neutrino helicity and the scalar and tensor coupling constants of weak interaction can be improved by a factor of ten.

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