Model independent determination of the sigma pole
| dc.creator | Leutwyler, H. | |
| dc.date | 2008-04-20 | |
| dc.date.accessioned | 2026-07-07T11:50:00Z | |
| dc.date.available | 2026-07-07T11:50:00Z | |
| dc.description | The first part of this report reviews recent developments at the interface between lattice work on QCD with light dynamical quarks, effective field theory and low energy precision experiments. Then I discuss how dispersion theory can be used to analyze the low energy structure of the $ππ$ scattering amplitude in a model independent manner. This leads to an exact formula for the mass and width of the lowest few resonances, in terms of observable quantities. As an application, I consider the pole position of the $σ$, paying particular to error propagation in the numerical analysis. The report is based on work done in collaboration with Irinel Caprini and Gilberto Colangelo. | |
| dc.description | 10 pages, 4 figures, Contribution to the proceedings of the Workshop on Scalar Mesons and Related Topics, honouring the 70th birthday of Michael Scadron, Lisbon, Portugal, Feb. 11-16, 2008 | |
| dc.identifier | https://arxiv.org/abs/0804.3182 | |
| dc.identifier | http://arxiv.org/abs/0804.3182 | |
| dc.identifier | AIPConf.Proc.1030:46-55,2008 | |
| dc.identifier | doi:10.1063/1.2973552 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/203435 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Model independent determination of the sigma pole | |
| dc.type | text |