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We propose a novel mechanism of electron localization and molecular symmetrybreaking in dissociative photoionization of the H$_2$ molecule. The Coulombfield of the ejected electron can induce transition of the remaining H$_2^+$ion from the gerade $^2\Sigma_g^1(1s\sigma_g)$ to the ungerade$^2\Sigma_u^1(2p\sigma_u)$ electronic state when the nuclei in a boundvibrational state are near the outer turning point. The superposition of thisprocess with a direct transition to vibrational continuum should produce anon-gerade ionic state which results in observed asymmetry in the $p$-Hejection relative to the electron ejection direction at a small kinetic energyrelease.

The p-H symmetry breaking in dissociative ionization of H2 due to the molecular ion interaction with the ejected electron