Particle Physics Seminar

Date: Wednesday 23^rd November 2005

Title: Recent results on the search of direct CP violation in K^+- -> 3 pi decays by the NA48/2 Collaboration

Speaker: Dr Luca Fiorini (Cambridge)

Abstract

NA48/2 is a high precision experiment on charged Kaon decays installed at SPS site of CERN and using a novel design for simultaneous K⁺/K^- beams and an upgraded NA48 set-up. Main goal of the experiment is the search of direct CP-violation in K^+- -> 3 pi decays. During the two years long data taking, an unprecedentedly large statistics of K^+- decays has been collected. Recent results on direct CP violation obtained by the analysis of 2003 data will be presented. The observation of a cusp-like effect in the pi^+- pi⁰ pi⁰ Dalitz plot and a linked novel method to measure the difference of pion-pion scattering lengths a₀-a₂ will be presented as well.