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Spectral representation for u- and t-channel exchange processes in a partial-wave decomposition
Title Spectral representation for u- and t-channel exchange processes in a partial-wave decomposition Author info Matthias F. M. Lutz, Evgeni E. Kolomeitsev, C. L. Korpa Author Lutz Matthias F. M. (34%)
Co-authors Kolomeitsev Evgeni E. 1970- (33%) UMBFP06 - Katedra fyziky
Korpa C. L. (33%)
Source document Physical Review D : covering particles, fields, gravitation, and cosmology. Vol. 92, no. 1 (2015), pp. 016003-1-016003-18. - Maryland : American Physical Society, 2015 Keywords čiastočné vlny fyzika - physics partial wave Language English Country United States of America systematics 53 Annotation 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 Public work category ADC No. of Archival Copy 33414 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika 
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