title: Comment on "Coherence and relaxation in potassium-doped helium droplets studied by femtosecond pump-probe Spectroscopy"
authors.affiliation: Advanced Research Laboratory, Hitachi, Ltd. Hatoyama, Saitama 350-0395, Japan.
authors.initials: MJ
authors.lastname: Weida
authors.initials: S
authors.lastname: Ogawa
authors.initials: H
authors.lastname: Petek