K+→π+π0e+e−: a novel short-distance probe
K+→π+π0e+e−: a novel short-distance probe
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K+→π+π0e+e−：一种新型短距离探针
DOI：
10.1140/epjc/s10052-012-1872-x
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Dao
中科院分区：
文献类型：
--
作者：
L. Cappiello;O. Catà;G. D’Ambrosio;Dao
We study the decay K{sup +}{yields}{pi}{sup +}{pi}{sup 0}e{sup +}e{sup -}, 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}{sup *}-mediated, contributions (Bremsstrahlung, 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{sup -} 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{sup +}{yields}{pi}{sup +}{pi}{sup 0}{gamma} and K{sub L}{yields}{pi}{sup +}{pi}{sup -}e{sup +}e{sup -} and discuss the advantages of K{sup +}{yields}{pi}{sup +}{pi}{sup 0}e{sup +}e{sup -} over them. (orig.)
We study the decay K{sup +}{yields}{pi}{sup +}{pi}{sup 0}e{sup +}e{sup -}, 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}{sup *}-mediated, contributions (Bremsstrahlung, 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{sup -} 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{sup +}{yields}{pi}{sup +}{pi}{sup 0}{gamma} and K{sub L}{yields}{pi}{sup +}{pi}{sup -}e{sup +}e{sup -} and discuss the advantages of K{sup +}{yields}{pi}{sup +}{pi}{sup 0}e{sup +}e{sup -} over them. (orig.)