%0 Journal Article %1 Goudzovski2011Kaon %A Goudzovski, Evgueni %D 2011 %K kaon %T Kaon programme at CERN: recent results %U http://arxiv.org/abs/1111.2818 %X Searches for lepton flavour and lepton number violation in kaon decays by the NA48/2 and NA62 experiments at CERN are presented. A precision measurement of the helicity-suppressed ratio RK of the K --> e nu and K --> mu nu decay rates has been performed using the full data set collected by the NA62 collaboration in 2007. The data sample amounted to 145,958 reconstructed K --> e nu candidates with 11.0\% background contamination. The result is RK = (2.488 +- 0.010) X 10^-5, which is in agreement with the Standard Model expectation. An improved upper limit on the lepton number violating K+- --> pi-+ mu+- mu+- decay rate is also presented.

@article{Goudzovski2011Kaon, abstract = {Searches for lepton flavour and lepton number violation in kaon decays by the NA48/2 and NA62 experiments at CERN are presented. A precision measurement of the helicity-suppressed ratio RK of the K --\> e nu and K --\> mu nu decay rates has been performed using the full data set collected by the NA62 collaboration in 2007. The data sample amounted to 145,958 reconstructed K --\> e nu candidates with 11.0\% background contamination. The result is RK = (2.488 +- 0.010) X 10^{-5}, which is in agreement with the Standard Model expectation. An improved upper limit on the lepton number violating K+- --\> pi-+ mu+- mu+- decay rate is also presented.}, added-at = {2019-02-23T22:09:48.000+0100}, archiveprefix = {arXiv}, author = {Goudzovski, Evgueni}, biburl = {https://www.bibsonomy.org/bibtex/26d1bf6bc6e09a6ab2e545b427809ff19/cmcneile}, citeulike-article-id = {10024839}, citeulike-linkout-0 = {http://arxiv.org/abs/1111.2818}, citeulike-linkout-1 = {http://arxiv.org/pdf/1111.2818}, day = 11, eprint = {1111.2818}, interhash = {1533036c61a2fd1f85484146cac64225}, intrahash = {6d1bf6bc6e09a6ab2e545b427809ff19}, keywords = {kaon}, month = nov, posted-at = {2011-11-14 09:35:17}, priority = {2}, timestamp = {2019-02-23T22:15:27.000+0100}, title = {{Kaon programme at CERN: recent results}}, url = {http://arxiv.org/abs/1111.2818}, year = 2011 }