TY  - JOUR
AU  - Cappiello, L.
AU  - Cata, O.
AU  - D'Ambrosio, G.
AU  - Gao, D. N.
PY  - 2012
DA  - 2012//
TI  - K+ -> pi(+) pi(0)e(+) e(-): a novel short-distance probe
T2  - Eur. Phys. J. C
JO  - European Physical Journal C
SP  - 1872 - 16pp
VL  - 72
IS  - 1
PB  - Springer
AB  - 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.
SN  - 1434-6044
UR  - http://arxiv.org/abs/1112.5184
UR  - https://doi.org/10.1140/epjc/s10052-012-1872-x
DO  - 10.1140/epjc/s10052-012-1872-x
LA  - English
N1  - WOS:000300631800001
ID  - Cappiello_etal2012
ER  -