On the determination of $σ$ from experimental data on the $ππ$ isoscalar $S$-wave at low energies
| dc.creator | Caprini, Irinel | |
| dc.date | 2008-04-14 | |
| dc.date.accessioned | 2026-07-07T11:49:49Z | |
| dc.date.available | 2026-07-07T11:49:49Z | |
| dc.description | We investigate the determination of the pole associated to $σ$ from $ππ$ scattering data below the $K\bar{K}$ threshold, including the new precise data from $K_{e4}$ decay reported recently by the NA48/2 Collaboration. Using a large class of analytic parametrizations based on expansions in powers of conformal variables, we obtain for the mass and width of $σ$ values which are consistent with those calculated recently using ChPT and Roy equations, but have larger theoretical uncertainties. | |
| dc.description | 6 pages, talk at SCADRON 70 (Workshop on Scalar Mesons and Related Topics, Lisbon, 11-16 February 2008) | |
| dc.identifier | https://arxiv.org/abs/0804.2108 | |
| dc.identifier | http://arxiv.org/abs/0804.2108 | |
| dc.identifier | AIPConf.Proc.1030:226-231,2008 | |
| dc.identifier | doi:10.1063/1.2973503 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/203370 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | On the determination of $σ$ from experimental data on the $ππ$ isoscalar $S$-wave at low energies | |
| dc.type | text |