  The effect of "anomalous" scattering of neutrons and electrons from protons
in the electron-volt energy-transfer range is considered, and related
experimental results are mentioned. A recent independent confirmation of this
effect with a new data analysis procedure is presented. Due to the very short
characteristic scattering time, there is no well defined separation of time
scales of electronic and protonic motions. An outline of a proposed theoretical
interpretation is presented, which is based on the fact that scattering protons
represent \textit{open} quantum systems, thus being subject to decoherence.
