Roper resonances in chiral quark models
| dc.creator | Golli, Bojan | |
| dc.creator | Sirca, Simon | |
| dc.date | 2007-08-28 | |
| dc.date | 2008-10-30 | |
| dc.date.accessioned | 2026-07-07T12:13:42Z | |
| dc.date.available | 2026-07-07T12:13:42Z | |
| dc.description | We derive a method to calculate the multi-channel K matrix applicable to a broad class of models in which mesons linearly couple to the quark core. The method is used to calculate pion scattering amplitudes in the energy region of low-lying P11 and P33 resonances. A good agreement with experimental data is achieved if in addition to the elastic channel we include the $πΔ$ and $σN$ ($σΔ$) channels where the $σ$-meson models the correlated two-pion decay. We solve the integral equation for the K matrix in the approximation of separable kernels; it yields a sizable increase of the widths of the $Δ(1232)$ and the N(1440) resonances compared to the bare quark values. | |
| dc.description | 17 pages, 7 figures | |
| dc.identifier | https://arxiv.org/abs/0708.3759 | |
| dc.identifier | http://arxiv.org/abs/0708.3759 | |
| dc.identifier | Eur.Phys.J.A38:271-286,2008 | |
| dc.identifier | doi:10.1140/epja/i2008-10677-3 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/210937 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Roper resonances in chiral quark models | |
| dc.type | text |