Comment on 'Time delays in molecular photoionization'

Abstract

In a recent article by Hockett et al (2016 J. Phys. B: At. Mol. Opt. Phys. 49 095602), time delays arising in the context of molecular single-photon ionization are investigated from a theoretical point of view. We argue that one of the central equations given in this article is incorrect and present a reformulation that is consistent with the established treatment of angle-dependent scattering delays (Eisenbud 1948 PhD Thesis Princeton University; Wigner 1955 Phys. Rev. 98 145-7; Smith 1960 Phys. Rev. 118 349-6; Nussenzveig 1972 Phys. Rev. D 6 1534-42).