We present simulations of the evolution of a proto-neutron star in which kaon-condensed matter might exist, including the effects of finite temperature and trapped neutrinos. The phase transition from pure nucleonic matter to the kaon condensate phase is described using Gibbs’ rules for phase equilibrium, which permit the existence of a mixed phase. A general property of neutron stars containin...

We report on the most debated issues which experimentation at the Φ factory can really shed light on with a short-term program of measurements. Recent, very promising improvements in the lattice-QCD calculations call for new precision measurements in the KAON sector to obtain more stringent results on CKM Unitarity and Lepton Flavour Universality. Neutral Kaon Interferometry can probe Discrete ...

Three-dimensional (3-D) source imaging techniques in conjunction with detailed model comparisons have shown the viability of disentangling the spatio-temporal information contained in two-pion interferometric measurements from ultra-relativistic heavy ion collisions. This has led to the observation of non-Gaussian tails in the 3-D pion source function and the extraction of finite pion emission ...

II. EXPERIMENTAL REQUIREMENTS ON CALORIMETER Decays of K mesons into ππ are reconstructed imposing that the four photons detected by the calorimeter have invariant mass equal to the kaon mass, checking that the kaon candidate parent is collinear with the beam direction, and that gamma pairs can be reconstructed as originating from π decays. The main detector requirements can be classified as fo...

We show that kaonic nuclei can be produced by the (K−, p) and (K−, n) reactions. The reactions are shown to have cross sections experimentally measurable. The observation of the kaonic nuclei gives a kaon-nucleus potential which answers the question on the existence of kaon condensation in dense nuclear matter especially neutron stars. Typeset using REVTEX

We study the equation of state of kaon-condensed matter including the effects of temperature and trapped neutrinos. Several different field-theoretical models for the nucleon-nucleon and kaon-nucleon interactions are considered. It is found that the order of the phase transition to a kaon-condensed phase, and whether or not Gibbs’ rules for phase equilibrium can be satisfied in the case of a fi...

The new results of investigation of K 0 L e3 and K ± e3 decays performed by NA48 Collaboration are presented. The measured branching fractions are used to extract V us. The values of Ke3 form-factors and radiative K 0 L e3γ branching ratio are reported. A list of recent NA48 results concerning some rare neutral kaon decays is given.