Comments to the problem of experimental determination of the neutron-electron scattering length and its theoretical interpretation

Details Comments to the problem of experimental determination of the neutron-electron scattering length and its theoretical interpretation Comments to the problem of experimental determination of the neutron-electron scattering length and its theoretical interpretation

2008-12-30

arxiv.org/abs/0812.5019v1

Physics

Nuclear Physics

Nuclear Experiment

8 pages, 1 figure

Scientific paper

We discuss the experimental data on the n,e-scattering length bne and the values of mean square charge radius of the neutron obtained from them. It is shown that the accumulated during the last 50 years most significant experimental estimates of the bne are not contradictory and lead to the average value =-0.1178+-0.0037 fm^2. Assuming that all the authors have underestimated the errors of their measurements by a factor of 1.7, the combined fit of all available experimental data would lead to Chi^2~1 per degree of freedom. Different modern theoretical predictions of are considered. They are found to be in a good agreement with the obtained experimental value . However the existing theoretical description of the structure of neutron does not provide a value of with a sufficient accuracy.

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