Ke4 decays and Wigner cusp
| dc.creator | Masetti, L. | |
| dc.date | 2007-04-10 | |
| dc.date.accessioned | 2026-07-07T10:20:17Z | |
| dc.date.available | 2026-07-07T10:20:17Z | |
| dc.description | The NA48/2 experiment at the CERN SPS collected in 2003 and 2004 large samples of the decays K+- -> pi+ pi- e+- nu (Ke4+-), K+- -> pi0 pi0 e+- nu (Ke400) and K+- -> pi0 pi0 pi+-. From the Ke4+- form factors and from the cusp in the M00^2 distribution of the K+- -> pi0 pi0 pi+- events, the pi-pi scattering lengths a00 and a20 could be extracted. This measurement is a fundamental test of Chiral Perturbation Theory (ChPT). The branching fraction and form factors of the Ke400 decay were precisely measured, using a much larger data sample than in previous experiments. An improved measurement of the slope parameters for the decay K+- -> pi0 pi0 pi+- showed evidence for a non-zero value of k. | |
| dc.description | Contribution to the proceedings of HQL06, Munich, October 16th-20th 2006 | |
| dc.identifier | https://arxiv.org/abs/0704.1307 | |
| dc.identifier | http://arxiv.org/abs/0704.1307 | |
| dc.identifier | ECONFC0610161:008,2006 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/174796 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Ke4 decays and Wigner cusp | |
| dc.type | text |