Electron localization in dissociating $H_2^+$ by retroaction of a   photoelectron onto its source
  We investigate the dissociation of $H_2^+$ into a proton and a $H^0$ after single ionization with photons of an energy close to the threshold. We find that the $p^+$ and the $H^0$ do not emerge symmetrically in case of the $H_2^+$ dissociating along the $1s\sigma_g$ ground state. Instead, a preference for the ejection of the $p^+$ in the direction of the escaping photoelectron can be observed. This symmetry breaking is strongest for very small electron energies. Our experiment is consistent with a recent prediction by Serov and Kheifets [Phys. Rev. A 89, 031402 (2014)]. In their model, which treats the photoelectron classically, the symmetry breaking is induced by the retroaction of the long range Coulomb potential onto the dissociating $H_2^+$. 
M. Waitz, D. Aslit\"urk, N. Wechselberger, H. K. Gill, J. Rist, F.   Wiegandt, C. Goihl, G. Kastirke, M. Weller, T. Bauer, D...
physics.atom-ph physics.atm-clus