2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42913We study Pomeron-Odderon interference effects giving rise to charge and single-spin asymmetries in diffractive electroproduction of a $π^+ π^-$ pair. The final state interactions and the role of $f_0$ meson are discussed. The absence of $f_0$ signal in the charge asymmetry observed by HERMES may be due to the smalness of its quark component.5 Pages, Talk presented by O. Teryaev at DIS-03 ConferenceHigh Energy Physics - Phenomenologytext