Lutz, Matthias F. M. Spectral representation for u- and t-channel exchange processes in a partial-wave decomposition / Matthias F. M. Lutz, Evgeni E. Kolomeitsev, C. L. Korpa. -- We study the analytic structure of partial-wave amplitudes derived from u- and t-channel exchange processes. The latter plays a crucial role in dispersion-theory approaches to coupled-channel systems that model final state interactions in QCD. A general spectral representation is established that is valid in the presence of anomalous thresholds, decaying particles or overlapping left-hand and right-hand cut structures as it occurs frequently in hadron physics. The results are illustrated at hand of ten specific processes

In Physical Review D : covering particles, fields, gravitation, and cosmology. -- Maryland : American Physical Society, 2015. -- ISSN 2470-0010. -- ISSN 2470-0029. -- Vol. 92, no. 1 (2015), pp. 016003-1-016003-18

1. čiastočné vlny 2. fyzika 3. partial wave

I. Kolomeitsev, Evgeni E., 1970-
II. Korpa, C. L.
III. Physical Review D : covering particles, fields, gravitation, and cosmology. -- Vol. 92, no. 1 (2015), pp. 016003-1-016003-18

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