Speaker
Prof.
Vladimir Kekelidze
(Joint Inst. for Nuclear Research (RU))
Description
The NA62 (phase-I) experiment at CERN collected a large sample of charged kaon decays in 2007-2008, allowing one to study these decays with a high precision. The first result of the helicity-suppressed ratio RK of the K+- --> e+- nu and K+- --> mu+- nu decay measurement based on this sample is presented. The result is in agreement with the Standard Model expectation, and constrains two-Higgs-doublets extension of the Standard Model. The status of analyses of rare decay K+- --> e nu gamma and very rare decay K+ -> pi+ pi0 e+ e- collected with a low intensity beam and minimum bias trigger conditions in 2007, is presented as well. Using the minimum bias data of NA62 and the data of NA48/2 experiment collected with minimum bias trigger in 2004, a large sample of K+- --> pi gamma gamma decays has been selected and analyzed. This analysis led to a precision test of the Chiral Perturbation Theory. The NA62 experiment at CERN SPS (phase-II) aims to collect of the order of 100 K+->p+nn events in two years of data taking, keeping the background at the level of 10%. The physics prospects and the status of the construction of the experiment will be presented.
Author
Prof.
Vladimir Kekelidze
(Joint Inst. for Nuclear Research (RU))
