Parity Violation in Polarized-Gamma Proton Compton Scattering

Original · EN

Polarized beam gamma p Compton scattering provides a theoretically clean way to extract the isovector parity violating pion-nucleon coupling constant hπNN⁽¹⁾. This channel is more tractable experimentally than the recently proposed extraction of hπNN⁽¹⁾ from the Bedaque-Savage process --- polarized target gamma p compton scattering. The leading parity violating effect is calculated using Heavy Baryon Chiral Perturbation Theory. The size of the asymmetry is estimated to be 4 10⁻⁸ for 120 MeV photon energy.