A Precise Determination of the Pion-Nuclear Coupling Parameter from Weak Processes in ^3He
Nuclear Theory
2009-10-30 v1
Abstract
We utilize precise weak interaction experiments on atomic muon capture and beta decay in the A = 3 nuclei, and take into account the effects of nuclear "anomalous thresholds" to extract the pseudoscalar pi-^3He-^3H coupling parameter, G^{eff}(m_\pi^2) = 45.8+- 2.4. This is an order of magnitude improvement in precision over that from the use of pion-nuclear scattering data and dispersion relations.
Cite
@article{arxiv.nucl-th/9612035,
title = {A Precise Determination of the Pion-Nuclear Coupling Parameter from Weak Processes in ^3He},
author = {Nimai C. Mukhopadhyay and K. Junker},
journal= {arXiv preprint arXiv:nucl-th/9612035},
year = {2009}
}
Comments
to be published in Phys. Rev. Lett