Parity-violating pion–nucleon coupling hπNN(1) from π+-electroproton production near the threshold

2000/11/30 by Jiunn-Wei Chen, Xiangdong Ji · 6 citations
Physics and Astronomy · #Atomic and Molecular Physics #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #nucl-th

paper · pdf · doi:10.1016/s0370-2693(01)00100-9

published as Phys.Lett. B501 (2001) 209-215 · 9 pages and 6 figures

arxiv created 2000/11/30 · openalex publication_date 2001/03/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29

Abstract

We study the possibility of measuring parity-violating pion-nucleon coupling h_πNN⁽¹⁾ from π⁺ electroproton production in the threshold region. We calculate the electron-helicity asymmetry in terms of h_πNN⁽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 10³⁸ sec^-1 cm^-2, and a running time of 10⁷ sec.

Citations

• Observability of the anapole moment and neutrino charge radius
• Chiral Dynamics in Nucleons and Nuclei

Cited by

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• Strangeness-conserving hadronic parity violation at low energies
• Hadronic Parity Violation: A New View Through the Looking Glass
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• Hadronic parity violation at next-to-leading order
• Measuring theP-Odd Pion-Nucleon CouplinghπNN(1)inπ+-Photoproton Production near Threshold