@Article{NA48/2CollaborationBatley+Fiorini2019,
author="NA48/2 Collaboration (Batley, J. R. et al
and Fiorini, L.",
title="First observation and study of the K-+/- -> pi(+/-)pi(0)e(+)e(-) decay",
journal="Physics Letters B",
year="2019",
publisher="Elsevier Science Bv",
volume="788",
pages="552--561",
abstract="The NA48/2 experiment at CERN reports the first observation of the K-+/- -> pi(+/-)pi(0)e(+)e(-) decay from an exposure of 1.7 x 10(11) charged kaon decays recorded in 2003-2004. A sample of 4919 candidates with 4.9{\%} background contamination allows the determination of the branching ratio in the full kinematic region, BR(K-+/- -> pi(+/-)pi(0)e(+)e(-)) = (4.24 +/- 0.14) x 10(-6). The study of the kinematic space shows evidence for a structure dependent contribution in agreement with predictions based on chiral perturbation theory. Several P- and CP-violating asymmetries are also evaluated.",
optnote="WOS:000455364400072",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3882), last updated on Sun, 27 Jan 2019 18:41:50 +0000",
issn="0370-2693",
doi="10.1016/j.physletb.2018.11.046",
opturl="http://arxiv.org/abs/1809.02873",
opturl="https://doi.org/10.1016/j.physletb.2018.11.046",
archivePrefix="arXiv",
eprint="1809.02873",
language="English"
}