Fiorenzo Ambrosino

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The broad physics program of the KLOE experiment is based on the high event rate at the Frascati φ factory, and calls for an up-to-date system for data acquisition and processing. In this review of the KLOE offline environment, the architecture of the data-processing system and the programs developed for data reconstruction and Monte Carlo simulation are(More)
A Neutrino Factory based on a muon storage ring is the ultimate tool for studies of neutrino oscillations, including possibly the discovery of leptonic CP violation. It is also the first step towards a µ + µ – collider. Ionization cooling of muons has never been demonstrated in practise but has been shown by end-to-end simulation and design studies to be an(More)
—Medium size HPC clusters play an important role in the HPC landscape in that they provide both the training environment for system scalability and a flexible production field for a large class of numerical problems. In this poster we present CRESCO4, the latest medium size HPC cluster purchased by ENEA, in operation since few months. CRESCO4 is part of a(More)
KLOE has measured most decay branching ratios of K S , K L and K ±-mesons. It has also measured the K L and the K ± lifetime and determined the shape of the form factors involved in kaon semileptonic decays. We present in the following a description of the above measurements and a well organized compendium of all of our data, with particular attention to(More)
In the fixed energy environment of the e + e − collider DAΦNE, KLOE can measure the cross section of the process e + e − → hadrons as a function of the hadronic system energy using the radiative return method. At energies below 1 GeV, e + e − → ρ → π + π − is the dominating hadronic process. We report here on the status of the analysis of the process e + e(More)
The branching ratio for the decay K + → π + ν ¯ ν is sensitive to new physics; the NA62 experiment will measure it to within about 10%. To reject the dominant background from channels with final state photons, the large-angle vetoes (LAVs) must detect particles with better than 1 ns time resolution and 10% energy resolution over a very large energy range.(More)
The KLOE experiment operating at the φ–factory DAΦNE has collected an integrated lumi-nosity of about 2.5 fb −1 and 250 pb −1 , on and off the φ meson peak respectively. Recent results achieved from studying properties of pseudoscalar and scalar mesons are presented.
While measuring the ratio R K = Γ(K ± e2(γ))/Γ(K ± µ2(γ)), the KLOE Collaboration has studied the radiative process K e2γ. The ratio of the width for the K e2γ decay with a positively polarized photon from structure-dependent radiation to the inclusive K µ2(γ) width is found to be 1.484(68) × 10 −5. The observed radiation spectrum agrees with predictions(More)
Precise measurements of semileptonic kaon decay rates at KLOE provide the measurement of the CKM mixing matrix element V us and information about lepton universality. Leptonic kaon decays provide an independent measurement of |V us | 2 / |V ud | 2 , through the ratio Γ(K → µν)/Γ(π → µν). These measurements, together with the result of |V ud | from nuclear β(More)