Article ID Journal Published Year Pages File Type
1846841 Nuclear Physics B - Proceedings Supplements 2009 4 Pages PDF
Abstract

The NA48/2 collaboration has shown clear experimental evidence for a cusp in the data for K→ππ0π0. This effect can be used to extract information on the ππ scattering lengths. We address this issue using a two-loop dispersive construction of ππ→ππ and K→πππ amplitudes in the presence of isospin breaking.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Nuclear and High Energy Physics