Parity-Violating Pion-Nucleon Coupling h_{\pi NN}^{(1)} from \pi^+ Electroproton Production Near the Threshold
Nuclear Theory
2009-11-06 v1
Abstract
We study the possibility of measuring parity-violating pion-nucleon coupling h_{\pi NN}^{(1)} from \pi^+ electroproton production in the threshold region. We calculate the electron-helicity asymmetry in terms of h_{\pi NN}^{(1)} and the Z-boson exchange between the electron and proton in leading-order heavy-baryon chiral perturbation theory. From the result, we demonstrate that the coupling can be determined to an accuracy of about 2 10^{-7} in an experiment with incident electron energy 250 MeV, luminosity 10^{38} sec^{-1} cm^{-2}, and a running time of 10^7 sec.
Keywords
Cite
@article{arxiv.nucl-th/0011100,
title = {Parity-Violating Pion-Nucleon Coupling h_{\pi NN}^{(1)} from \pi^+ Electroproton Production Near the Threshold},
author = {Jiunn-Wei Chen and Xiangdong Ji},
journal= {arXiv preprint arXiv:nucl-th/0011100},
year = {2009}
}
Comments
9 pages and 6 figures