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Pregled bibliografske jedinice broj: 220709

Zbornik radova

Autori: Ceci, Saša; Švarc, Alfred; Zauner, Branimir
Naslov: The influence of inelastic channels upon the pole structure of partial wave T-matrices in the coupled channel pion-nucleon partial wave analysis
Izvornik: Proceedings of the Workshop on the Physics of Excited Nucleons Nstar2005 / Simon Capstick ; Volker Crede, Paul Eugenio (ur.). - New Jersey : World Scientific , 2006. 376-380.
Skup: NSTAR 2005 The Physics Of Excited Baryons
Mjesto i datum: Tallahassee, Florida, SAD., 12-15.10.2005.
Ključne riječi: coupled channel partial wave analysis; inelastic channels
Sažetak:
The method of avoiding continuum ambiguities in a pion-nucleon partial wave analysis in the inelastic region by using the coupled channel formalism is discussed. The very number of poles of the analytic partial wave T-matrix, their position in the complex energy plane and their residues depend strongly on the number of channels used for constraining the free parameters of the model. The criteria for determining the minimal number of poles needed to describe the given input are discussed, and the procedure of increasing the number of poles necessary for simultaneously describing additional channels is introduced. The interplay of the pole structure and the number of inelastic channels is demonstrated for the P11 partial wave for the case of inclusion of pi N -> eta N channel into the coupled channel partial wave analysis in addition to the full pi N elastic data base. The N(1710) P11 resonance is a clear example when the continuum ambiguity, present when solely the pi N elastic scattering data are analyzed, is spontaneously eliminated by increasing the number of resonant states when the piN -> eta N channel data are included in the framework of coupled channel partial wave analysis formalism.
Vrsta sudjelovanja: Predavanje
Vrsta prezentacije u zborniku: Cjeloviti rad (više od 1500 riječi)
Vrsta recenzije: Međunarodna recenzija
Projekt / tema: 0098009
Izvorni jezik: ENG
Kategorija: Znanstveni
Znanstvena područja:
Fizika
URL Internet adrese: http://hadron.physics.fsu.edu/NSTAR2005/parallel3_pre.htm
Napomene:
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