Cusps in K --> 3pi decays: a theoretical framework

Details Cusps in K --> 3pi decays: a theoretical framework Cusps in K --> 3pi decays: a theoretical framework

2011-03-22

arxiv.org/abs/1103.4273v1

Nucl.Phys.B850:96-147,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

50 pages, 20 figures

Scientific paper

10.1016/j.nuclphysb.2011.04.013

Based on the analysis of 6.031*10^7 K+- --> pi0 pi0 pi+- decays, the NA48/2 collaboration has recently determined the S-wave pi-pi scattering lengths a_0-a_2 with high precision. In addition, the scattering length a_2 has been independently measured, although less precisely so. The present article discusses in detail one of the theoretical frameworks used in the data analysis.

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