Parity-violating pion-nucleon coupling hπNN(1) from π+-electroproton production near the threshold
Journal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Journal Volume
501
Journal Issue
3月4日
Pages
209-215
Date Issued
2001
Author(s)
Ji, X.
Abstract
We study the possibility of measuring parity-violating pion-nucleon coupling hπNN(1) from π+-electroproton production in the threshold region. We calculate the electron-helicity asymmetry in terms of hπNN(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 ∼ 2 × 10-7 in an experiment with incident electron energy 250 MeV, luminosity 1038 s-1 cm-2, and a running time of 107 s. © 2001 Published by Elsevier Science B.V.
SDGs
Type
journal article