Dynamical coupled-channels study of pi N --> pi pi N reactions
| dc.creator | Kamano, H. | |
| dc.creator | Julia-Diaz, B. | |
| dc.creator | Lee, T. -S. H. | |
| dc.creator | Matsuyama, A. | |
| dc.creator | Sato, T. | |
| dc.date | 2008-07-14 | |
| dc.date | 2009-01-15 | |
| dc.date.accessioned | 2026-07-07T12:48:21Z | |
| dc.date.available | 2026-07-07T12:48:21Z | |
| dc.description | As a step toward performing a complete coupled-channels analysis of the world data of pi N, gamma^* N --> pi N, eta N, pi pi N reactions, the pi N --> pi pi N reactions are investigated starting with the dynamical coupled-channels model developed in Phys. Rev. C76, 065201 (2007). The channels included are pi N, eta N, and pi pi N which has pi Delta, rho N, and sigma N resonant components. The non-resonant amplitudes are generated from solving a set of coupled-channels equations with the meson-baryon potentials defined by effective Lagrangians. The resonant amplitudes are generated from 16 bare excited nucleon (N^*) states which are dressed by the non-resonant interactions as constrained by the unitarity condition. The data of total cross sections and pi N and pi pi invariant mass distributions of pi^+ p --> pi^+ pi^+ n, pi^+ pi^0p and pi^- p --> pi^+ pi^- n, pi^- pi^0 n, pi^0 pi^0 n reactions from threshold to the invariant mass W = 2 GeV can be described to a very large extent. We show the importance of the coupled-channels effects and the strong interference between the contributions from the pi Delta, sigma N, and rho N channels. The large interference between the resonant and non-resonant amplitudes is also demonstrated. Possible future developements are discussed. | |
| dc.description | 22 pages, 13 figures; accepted for publication in PRC | |
| dc.identifier | https://arxiv.org/abs/0807.2273 | |
| dc.identifier | http://arxiv.org/abs/0807.2273 | |
| dc.identifier | Phys.Rev.C79:025206,2009 | |
| dc.identifier | doi:10.1103/PhysRevC.79.025206 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/222028 | |
| dc.subject | Nuclear Theory | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Dynamical coupled-channels study of pi N --> pi pi N reactions | |
| dc.type | text |