2020 Impact factor 4.590
Particles and Fields
Eur. Phys. J. C 18, 41-55
DOI 10.1007/s100520000504

A detailed description of the analysis of the decay
of neutral kaons to ${\mathrm{\pi^+\pi^-}}$ in the CPLEAR experiment

The CPLEAR Collaboration

A. Apostolakis1 - et al.

1 University of Athens, 10680 Athens, Greece

Received: 8 May 2000 / Published online: 13 November 2000 - © Springer-Verlag 2000

A detailed description is given of the analysis of neutral kaons decaying to ${\mathrm{\pi^+\pi^-}}$, based on the complete set of data collected with the CPLEAR experiment. Using a novel approach involving initially strangeness-tagged K0 and ${\mathrm{\overline{K}{}^0}}$, the time-dependent decay-rate asymmetry has been measured. This asymmetry, resulting from the interference between the KS and KL decay amplitudes, has enabled both the magnitude and phase of the CP-violation parameter, \ensuremath{\eta_{+-}}, to be measured, with a precision comparable to that of the current world-average values.

Copyright Società Italiana di Fisica, Springer-Verlag 2000