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The Branching Ratio (BR) of the rare decay K+ → π+ν is predicted with a small error in the framework of the standard model (SM). The contribution of long distance terms is suppressed thanks to the… Continue Reading
The beam and detector, used for the NA48 experiment, devoted to the measurement of Re(e′/e), and for the NA48/1 experiment on rare KS and neutral hyperon decays, are described.
We propose a search of galactic axions with mass about 0.2 microeV using a large volume resonant cavity, about 50 m^3, cooled down to 4 K and immersed in a moderate axial magnetic field of about 0.6… Continue Reading
In high energy physics experiment the trigger system is crucial to reduce the quantity of data recorded on tape and the acquisition bandwidth requirements. This is particularly true in rare decays… Continue Reading
The NA62 experiment recorded a large sample of K+→μ+νμ decays in 2007. A peak search has been performed in the reconstructed missing mass spectrum. In the absence of a signal, limits in the range… Continue Reading
A time-to-digital converter-based system, to be used for most subdetectors in the high-flux rare-decay experiment NA62 at CERN SPS, was built as part of the NA62 fully digital trigger and data… Continue Reading
The NA48/2 experiment at CERN collected a large sample of charged kaon decays to final states with multiple charged particles in 2003--2004. A new upper limit on the rate of the lepton number… Continue Reading
The giant radio galaxy M 87 with its proximity (16 Mpc), famous jet, and very massive black hole ((3-6) x 10(9) M-circle dot) provides a unique opportunity to investigate the origin of very high… Continue Reading
Abstract The NA62 experiment at CERN, aimed to measure K + → π + ν ν ¯ branching fraction (O(10 −10 )), relies on a Neon based RICH detector for π / μ separation, time measurement and level 0… Continue Reading
A study of the dynamics of the rare decayK±→π±γγhas been performed on a sample of 232 decaycandidates, with an estimated background of 17.4±1.1 events, collected by the NA62 experiment atCERN in… Continue Reading