Naslov
Fixed-t analyticity as a constraint in single- energy partial-wave analyses of meson photoproduction reactions

Autori
Osmanović, Hedim ; Hadžimehmedović, Mirza ; Omerović, Rifat ; Stahov, Jugoslav ; Kashevarov, Viktor ; Nikonov, Kiril ; Ostrick, Michael ; Tiator, Lothar ; Švarc, Alfred

Izvornik
Physical review. C (2469-9985) 97 (2018), 1; 015207, 24

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

Ključne riječi
fixed-t analyticity ; partial wave analysis ; meson photoproduction

Sažetak
Partial-wave amplitudes of meson photoproduction reactions are an important source of information in baryon spectroscopy.We investigate a new approach in single-energy partial-wave analyses of these reactions. Instead of using a constraint to theoretical models in order to achieve solutions which are continuous in energy, we enforce the analyticity of the amplitudes at fixed values of the Mandelstam variable t . We present an iterative procedure with successive fixed-t amplitude analyses which constrain the single-energy partial-wave analyses and apply this method to the γp → ηp reaction. We use pseudodata, generated by the EtaMAID model, to test the method and to analyze ambiguities. Finally, we present an analytically constrained partial-wave analysis using experimental data for four polarization observables recently measured at MAMI and GRAAL in the energy range from threshold to √s = 1.85 GeV.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA