Spectral representation for u - And t -channel exchange processes in a partial-wave decomposition

M. F M Lutz, E. E. Kolomeitsev, C. Korpa

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number016003
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume92
Issue number1
DOIs
Publication statusPublished - Jul 15 2015

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decomposition
quantum chromodynamics
physics
thresholds
interactions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Spectral representation for u - And t -channel exchange processes in a partial-wave decomposition. / Lutz, M. F M; Kolomeitsev, E. E.; Korpa, C.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 92, No. 1, 016003, 15.07.2015.

Research output: Contribution to journalArticle

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