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arXiv · 1501.01832

Parity violation in neutron capture on the proton: determining the weak pion-nucleon coupling

J. de Vries·N. Li·Ulf-G. Meißner·A. Nogga·E. Epelbaum·N. Kaiser
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Abstract

We investigate the parity-violating analyzing power in neutron capture on the proton at thermal energies in the framework of chiral effective field theory. By combining this analysis with a previous analysis of parity violation in proton-proton scattering, we are able to extract the size of the weak pion-nucleon coupling constant. The uncertainty is significant and dominated by the experimental error which is expected to be reduced soon.

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J. de Vries, N. Li, Ulf-G. Meißner, A. Nogga, E. Epelbaum, N. Kaiser. 2015-06-12. Parity violation in neutron capture on the proton: determining the weak pion-nucleon coupling. https://doi.org/10.1016/j.physletb.2015.05.074

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