| Abstract: | A study is made of the simplest (pole) mechanisms of violation of the invariance under spatial reflection near the threshold of pion electroproduction on nucleons. A detailed investigation is made of the Born mechanism of violation of P invariance and also vector meson exchange with violation of P invariance at the electromagnetic or the strong vertices. The contribution of  isobars is calculated in the framework of the isobar model in the resonance region of energies.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 4, pp. 3–10, April, 1980. |
