Parity violating pion electroproduction off the nucleon |
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Authors: | H -W Hammer D Drechsel |
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Institution: | 1. Institut für Kernphysik, Johannes Gutenberg-Universit?t Mainz, D-55099, Mainz, Germany
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Abstract: | Parity violating (PV) contributions due to interference betweenγ and Z0 exchange are calculated for pion electroproduction off the nucleon. A phenomenological model with effective Lagrangians is used to determine the resulting asymmetry for the energy region between threshold andΔ(1232) resonance. TheΔ resonance is treated as a Rarita-Schwinger field with phenomenological NΔ transition currents. The background contributions are given by the usual Born terms using the pseudovectorπN Lagrangian. Numerical results for the asymmetry are presented. |
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