1,721,367 research outputs found
K+−μ3 Form Factors Measurement at NA48/2
Full text linkAbstract: We report here a measurement of form factors of K±μ3 decay by the NA48/2 experiment at CERN. Using a sample of 3.4×106 events we provide preliminary form factor values according to various parametrizations. The slope of the scalar form factor is in agreement with other measurements and theory predictions
Semileptonic KL Decays at NA48
No full textPreliminary results on KL->pi e nu(gamma) decays collected by the NA48 detector at the CERN SPS are reported. Using a sample of 6.8 X 10^6 reconstructed events BR(Ke3) = 0.4010+-0.0028+-0.0035 was obtained. From the branching ratio the value of |Vus|= 0.2187+-0.0028 was extracted. The same data sample has provided also a high precision measurement of the slope lambda+ of the form factor of the Ke3 decay. Investigating the Ke3gamma decay, from a sample of 18977 reconstructed events, BR(Ke3gamma)/BR(Ke3) = (0.964+-0.008+0.012-0.011)% was determined.Preliminary results on KL->pi e nu(gamma) decays collected by the NA48 detector at the CERN SPS are reported. Using a sample of 6.8 X 10^6 reconstructed events BR(Ke3) = 0.4010+-0.0028+-0.0035 was obtained. From the branching ratio the value of |Vus|= 0.2187+-0.0028 was extracted. The same data sample has provided also a high precision measurement of the slope lambda+ of the form factor of the Ke3 decay. Investigating the Ke3gamma decay, from a sample of 18977 reconstructed events, BR(Ke3gamma)/BR(Ke3) = (0.964+-0.008+0.012-0.011)% was determined.Preliminary results on KL->pi e nu(gamma) decays collected by the NA48 detector at the CERN SPS are reported. Using a sample of 6.8 X 10^6 reconstructed events BR(Ke3) = 0.4010+-0.0028+-0.0035 was obtained. From the branching ratio the value of |Vus|= 0.2187+-0.0028 was extracted. The same data sample has provided also a high precision measurement of the slope lambda+ of the form factor of the Ke3 decay. Investigating the Ke3gamma decay, from a sample of 18977 reconstructed events, BR(Ke3gamma)/BR(Ke3) = (0.964+-0.008+0.012-0.011)% was determined.Preliminary results on KL->pi e nu(gamma) decays collected by the NA48 detector at the CERN SPS are reported. Using a sample of 6.8 X 10^6 reconstructed events BR(Ke3) = 0.4010+-0.0028+-0.0035 was obtained. From the branching ratio the value of |Vus|= 0.2187+-0.0028 was extracted. The same data sample has provided also a high precision measurement of the slope lambda+ of the form factor of the Ke3 decay. Investigating the Ke3gamma decay, from a sample of 18977 reconstructed events, BR(Ke3gamma)/BR(Ke3) = (0.964+-0.008+0.012-0.011)% was determined
NA48 results on kaon and hyperon decays relevant to |
Full text linkNew results from the NA48 experiment on kaon and hyperon decays relevant to are reported here. For charged kaons we present measurements of and . On neutral kaon decays we report the measurements of and of form factors slopes. For hyperons we present results on the .New results from the NA48 experiment on kaon and hyperon decays relevant to |V_us| are reported here. For charged kaons we present measurements of BR(K+- -> pi0 e+- nu) and BR(K+- -> pi0 mu+- nu). On neutral kaon decays we report the measurements of BR(K_L -> pi+ pi-) and of K_L -> pi+- mu-+ nu form factors slopes. For hyperons we present results on the BR(Xi0 -> Sigma+ e- nu_e)
A study of nuclear effects in interactions with the NOMAD detector
No full textNuclear effects in \numucc interactions with carbon nuclei have been studied by using backward going protons and . Detailed analyses of the momentum distributions and of the production rates, have been carried out in order to understand the mechanism producing these particles. The backward proton data have been compared with the predictions of the reinteraction and the short range correlation models.Nuclear effects in \numucc interactions with carbon nuclei have been studied by using backward going protons and . Detailed analyses, of the momentum distributions and of the production rates, have been carried out in order to understand the mechanism producing these particles. The backward proton data have been compared with the predictions of the reinteraction and the short range correlation models
GEANT4 simulation of a 3D Compton imaging device
No full textA 3D brain imaging device based on Compton scattering is investigated with
a GEANT4 Monte-Carlo simulation. The proposed device relies on a novel 3D
imaging technique which, contrary to other approaches like Compton
cameras, does not require any backprojection procedure. We study the
attainable sensitivity in the detection of density variations as a
function of the beam energy, the depth inside the object and size and
density of the inclusions. At midbrain position a resolution of about 2 mm
and a contrast of 12% are obtained. In addition the simulation indicates
that a complete brain scan at 600 keV beam energy would result in an
effective dose of about 1 mSv
PEPSI: A Monte Carlo generator for polarized leptoproduction
No full textWe describe PEPSI (Polarized Electron Proton Scattering Interactions), a Monte Carlo program for polarized deep inelastic leptoproduction mediated by electromagnetic interaction, and explain how to use it. The code is a modification of the LEPTO 4.3 Lund Monte Carlo for unpolarized scattering. The hard virtual gamma-parton scattering is generated according to the polarization-dependent QCD cross-section of the first order in αS. PEPSI requires the standard polarization-independent JETSET routines to simulate the fragmentation into final hadrons
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