2008/04/29 by Evgueni Goudzovski, Goudzovski, Evgueni
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex
paper · pdf · doi:10.48550/arxiv.0804.4633
A talk given at DIS 2008, 7-11 April 2008, University College London. 4 pages
arxiv created 2008/04/30 · arxiv updated 2009/12/01
The ratio RK = Γ(K±→ e±ν(γ)) / Γ(K±→μ±ν(γ)) provides a powerful probe of the structure of weak interactions. It is calculated with very high precision within the Standard Model, but corrections due to the presence of New Physics could be in a few percent range. Development of NA48/NA62 method based on test data samples of 2003-04, and the status of analysis based on a dedicated 2007 run are discussed. In addition, a proposal to measure the ultra rare decay K+→π+νν at the CERN SPS is presented.