Naslov
Cusp effect and the analytical continuation of the channel propagators in the two body multichannel Cutkosky formalism

Autori
Batinić, Mijo ; Dadić, Ivan ; Švarc, Alfred

Izvornik
Fizika B : a journal of experimental and theoretical physics : general physics, nuclear physics, particles and fields (1330-0016) 6 (1997), 1; 53-62

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
continuation;channel propagator; Cutkosky formalism

Sažetak
Cutkosky coupled multichannel, and manifestly unitary model, reduced to three two-body coupled channels, has been used to predict eight lowest partial-wave T-matrices for the Pi N -> Pi N and Eta N -> Eta N processes by the Zagreb-Los Angeles collaboration. The shape of the S_11-wave cusp effect near Eta production threshold for the Pi N elastic scattering turned out to be wrong in the first analysis, and has been corrected by the Zagreb-Los Angels-Argonne update of the analysis. The shape error has been traced back to the numerically incorrect assumption of the input sign of the Cutkosky channel propagators. The details of the error, correct form of the input function and the correct analytical continuation of the channel propagators is presented.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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