出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We overview the detailed analysis of "0=" within the Standard Model, presented
in ref. [1]. When all sources of large logarithms are considered, both at short and
long distances, it is possible to perform a reliable Standard Model estimate of "0=". The
strong S{wave rescattering of the nal pions has an important impact on this observable
[1, 2]. The Standard Model prediction is found to be [1] Re ("0=") = (1:70:9) 10−3,
in good agreement with the most recent experimental measurements. A better estimate
of the strange quark mass would reduce the uncertainty to about 30%.
