title: A complex T-matrix derivation of a resonance amplitude.
abstract: A resonant transition amplitude, valid to arbitrary order, is derived through the use of a complex energy T-matrix.  A feature of this amplitude is its generality and simplicity making it useful for widespread applications in resonance theory.
authors.affiliation: Physics Department, Old Dominion University, Norfolk, VA 23508, USA.
authors.forename: J W
authors.initials: JW
authors.lastname: Norbury
authors.forename: L W
authors.initials: LW
authors.lastname: Townsend
authors.forename: P A
authors.initials: PA
authors.lastname: Deutchman
mesh_terms: D019471:Elementary Particle Interactions; D004735:Energy Transfer; D008433:Mathematics; D008651:Mesons; D008962:Models, Theoretical; D009686:Nuclear Physics; D013057:Spectrum Analysis