%0 Journal Article
%T K+ -> pi(+) pi(0)e(+) e(-): a novel short-distance probe
%A Cappiello, L.
%A Cata, O.
%A D'Ambrosio, G.
%A Gao, D. N.
%J European Physical Journal C
%D 2012
%V 72
%N 1
%I Springer
%@ 1434-6044
%G English
%F Cappiello_etal2012
%O WOS:000300631800001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=928), last updated on Thu, 22 Mar 2012 12:44:27 +0000
%X We study the decay K+ -> pi(+) pi(0)e(+) e(-), currently under analysis by the NA62 Collaboration at CERN. In particular, we provide a detailed analysis of the Dalitz plot for the long-distance, gamma*-mediated, contributions (Brems-strahlung, direct emission and its interference). We also examine a set of asymmetries to isolate genuine short-distance effects. While we show that charge asymmetries are not required to test short distances, they provide the best environment for its detection. This constitutes by itself a strong motivation for NA62 to study K- decays in the future. We therefore provide a detailed study of different charge asymmetries and the corresponding estimated signals. Whenever possible, we make contact with the related processes K+ -> pi(+) pi(0)gamma and K-L -> pi(+) pi(0)e(+) e(-) and discuss the advantages of K+ -> pi(+) pi(0)e(+) e(-) over them.
%R 10.1140/epjc/s10052-012-1872-x
%U http://arxiv.org/abs/1112.5184
%U https://doi.org/10.1140/epjc/s10052-012-1872-x
%P 1872 - 16pp