Publisher
Springer Berlin Heidelberg
Reference16 articles.
1. Time delay has been introduced previously in a similar way by F. T. Smith, Phys. Rev.
118, 349 (1960) based on
2. E. P. Wigner, Phys. Rev. 98, 145 (1955).
3. Gel’fand and Shilov (1964), Vol. 1.
4. Cf. the discussion in Section II.9.
5. One obtains dispersion relations when these analytic properties are expressed in terms of integral relations between different matrix elements for real values of the variables.