Naslov
Presence of Extra P11 Resonances in Zagreb Analysis Since 1995.

Autori
Ceci, Saša ; Švarc, Alfred ; Zauner, Branimir

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the NSTAR2004: Workshop on the Physics of Excited Baryons (BRAG2004) / Bocquet, J. ; Kusnetzov, V. ; Rebreyand, D. - Singapur : London : München : Ženeva : Tokyo : Hong Kong : Taipei : Peking : Šangaj : Tianjin : Chennai : World Scientific Publishing, 2005, 373-377

Skup
Baryon Resonance Analysis Group meeting (BRAG2004)

Mjesto i datum
Grenoble, Francuska, 23.03.2004

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
baryon resonances; P11

Sažetak
The partial wave T-matrices for the piN, etaN and pi^2N channels have been obtained within the framework of the coupled channel model using the piN elastic and piN - etaN data base as input. It has been shown that for the P11partial wave an equally good representation of the experimental data (namely the T_{; ; ; pi N, pi N}; ; ; and T_{; ; ; pi N, eta N}; ; ; T-matrices) can be obtained using either three, or four poles for the Green function propagator. However, the three Green function pole solution is not acceptable due to the structure of the extracted resonances. The two out of four P11 resonances, those lying in the energy range 1700 MeV < M_R < 1800 MeV, are poorly determined, but they seem to be strongly inelastic. The inclusion of other inelastic channels is needed to determine masses and widths of missing resonances with greater precision.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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