New results on kaon decays from NA48/2

Details New results on kaon decays from NA48/2 New results on kaon decays from NA48/2

2008-05-21

arxiv.org/abs/0805.3312v2

Physics

High Energy Physics

High Energy Physics - Experiment

Proceedings from Moriond QCD 2008 conference. 4 pages, 1 photo and 6 figures. More references included

Scientific paper

Recent results from the NA48/2 experiment are presented. The $\pi\pi$ scattering lengths $a_0^0$ and $a_0^2$ have been extracted from the cusp in the $M_{00}^2$ distribution of $K^\pm \to \pi^\pm \pi^0 \pi^0$ decays and from the $K^\pm \to \pi^+ \pi^- e^\pm \nu$ phase shift $\delta$. Branching ratios and form factors have been measured for {$K^\pm \to \pi^\pm \gamma \gamma$}, {$K^\pm \to \pi^\pm \gamma e^+ e^-$} and {$K^\pm \to \pi^\pm e^+ e^-$} decays and are also summarized here.

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