The position and the residues of the delta resonance pole in pion photoproduction
| dc.creator | Hanstein, O. | |
| dc.creator | Drechsel, D. | |
| dc.creator | Tiator, L. | |
| dc.date | 1996-05-08 | |
| dc.date.accessioned | 2026-07-07T11:15:45Z | |
| dc.date.available | 2026-07-07T11:15:45Z | |
| dc.description | We have analyzed the $M_{1+}^{(3/2)}$ and $E_{1+}^{(3/2)}$ multipole amplitudes of pion photoproduction in the framework of fixed-$t$ dispersion relations. Applying the speed plot technique to our results for these multipoles, we have determined the position and the residues of the $Δ$ (1232) resonance pole. The pole is found at total $c.m.$ energy $W = (1211 - 50i)$ MeV on the second Riemann sheet, and the ratio of the electric and magnetic residues is $R_Δ = - 0.035 - 0.046 i$, resulting in an E2/M1 ratio for the "dressed" delta resonance of $- 3.5 \%$. | |
| dc.description | 16 pages LATEX including 5 postscript figures in a self-extracting uufile archive | |
| dc.identifier | https://arxiv.org/abs/nucl-th/9605008 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/9605008 | |
| dc.identifier | Phys.Lett.B385:45-51,1996 | |
| dc.identifier | doi:10.1016/0370-2693(96)00855-6 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/192486 | |
| dc.subject | Nuclear Theory | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | The position and the residues of the delta resonance pole in pion photoproduction | |
| dc.type | text |