epsilon'/eps in the Standard Model

Details epsilon'/eps in the Standard Model epsilon'/eps in the Standard Model

2001-11-21

arxiv.org/abs/hep-ph/0111262v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk presented at the International Europhysics Conference on High Energy Physics, July 12-18, 2001,Budapest, Hungary

Scientific paper

We overview the detailed analysis of epsilon'/epsilon 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 epsilon'/epsilon. The strong S-wave rescattering of the final pions has an important impact on this observable. The Standard Model prediction is found to be Re(epsilon'/epsilon) =(1.7 +- 0.9)*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%.

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