Parity-Violating Pion-Nucleon Coupling h_{πNN}^{(1)} from π^+ Electroproton Production Near the Threshold

Details Parity-Violating Pion-Nucleon Coupling h_{πNN}^{(1)} from π^+ Electroproton Production Near the Threshold Parity-Violating Pion-Nucleon Coupling h_{πNN}^{(1)} from π^+ Electroproton Production Near the Threshold

2000-11-30

arxiv.org/abs/nucl-th/0011100v1

Phys.Lett. B501 (2001) 209-215

Physics

Nuclear Physics

Nuclear Theory

9 pages and 6 figures

Scientific paper

10.1016/S0370-2693(01)00100-9

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.

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