| Główna > Tests of chiral perturbation theory with $K_{e4}$ decays at NA48/2 |
| Article | |
| Title | Tests of chiral perturbation theory with $K_{e4}$ decays at NA48/2 |
| Author(s) | Balev, Spasimir (Pisa, Scuola Normale Superiore ; INFN, Pisa) |
| Publication | 2009 |
| In: | Acta Phys. Pol. B Proc. Suppl. 2 (2009) pp.385 |
| In: | International Meeting on Excited QCD, Zakopane, Poland, 08 - 14 Feb 2009, pp.385-390 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN SPS ; NA48/2 |
| Abstract | The experiment NA48/2 at CERN SPS performed high precision measurement of the form factors of $K^{\pm} \rightarrow \pi^{+}\pi^{-}e^{\pm}\nu$ decays and s-wave $\pi \pi$ scattering lengths $a_{0}$ and $a_{2}$ for isospin 0 and 2, respectively. The preliminary result on the full available statistics of more than 1 million $K^{\pm}_{e4}$ decays achieves a precision similar to the theoretical one and provides excellent test of Chiral Perturbation Theory. |