Parity conserving gamma asymmetry in n-p radiative capture
Abstract
The importance of n-p radiative capture, utilizing polarized cold neutrons, as a means of measuring the weak pion coupling constant is reviewed. Parity conserving processes of the form k_gamma*[s_n,k_n] can contribute to the s_n*k_gamma photon asymmetry in any such experiment, if the apparatus is not perfectly symmetric. For an incident laboratory neutron energy of 0.003 eV a value of A^{PC}_{gamma}=0.67*10^{-8} is obtained for two different potential models (Argonne AV14 and Nijmegen Reid93). Serving as an extreme test case, the Reid soft core potential yields 0.61*10^{-8}, close to the result of the contemporary forces. Implications for extracting the weak pion coupling constant and for monitoring the beam polarization are discussed.
Keywords
Cite
@article{arxiv.nucl-th/9704063,
title = {Parity conserving gamma asymmetry in n-p radiative capture},
author = {Attila Csoto and B. F. Gibson and G. L. Payne},
journal= {arXiv preprint arXiv:nucl-th/9704063},
year = {2016}
}
Comments
8 pages