We identify the dominant collisional decoherence mechanism which serves to stabilize and super-select the configuration states of chiral molecules. A high-energy description of this effect is compared to the results of the exact molecular scattering problem, obtained by solving the coupled-channel equations. It allows to predict the experimental conditions for observing the collisional suppression of the tunneling dynamics between the left-handed and the right-handed configuration of D2S2 molecules.
The expression "ωz/2π=176 Hz" should be replaced by "ωz=176 Hz" (or by "ωz/2π=28 Hz"). The results are unaffected by this.