26 Result(s)
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Article
Open AccessPrecise tests of low energy QCD from \(\mbox {\)\mathrm {K}_{\mathrm {e}4}\(}\) decay properties
We report results from the analysis of the \(\mbox {\)\mathrm {K}^{\pm}\(}\rightarrow \pi^{+} \pi^{-} \mathrm{e}^{\pm} \nu\) ( ...
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Open AccessMeasurement of the direct emission and interference terms and search for CP violation in the decay K ±→π ± π 0 γ
We report on the measurement of the direct emission (DE) and interference (INT) terms of the K ±→π ± π 0 ...
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Article
Open AccessDetermination of the S-wave π π scattering lengths from a study of K ±→π ± π 0 π 0 decays
We report the results from a study of the full sample of ∼6.031×107 K ±→π ± π 0 ...
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Article
Open AccessNew high statistics measurement of Ke4 decay form factors and ππ scattering phase shifts
We report results from a new measurement of the Ke4 decay K±→π+π-e±ν by the NA48/2 collaboration at the CERN SPS, based on a partial sample of more than 670 000 Ke4 decays in both charged modes collected in 2003....
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Article
Measurements of charged kaon semileptonic decay branching fractions K±→π0μ±ν and K±→π0e±ν and their ratio
In an earlier paper [1], the background for Ke3 was over estimated due to an erroneous calculation of the electron identification efficiency. The correct ratios of the partial widths involving this channel are ...
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Article
Search for direct CP violating charge asymmetries in K±→π±π+π- and K±→π±π0π0 decays
A measurement of the direct CP violating charge asymmetries of the Dalitz plot linear slopes Ag=(g+-g-)/(g++g-) in K±→π±π+π- and K±→π±π0π0 decays by the NA48/2 experiment at CERN SPS is presented. A new technique...
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Article
Measurements of charged kaon semileptonic decay branching fractions K±→π0μ±ν and K±→π0e±ν and their ratio
Measured ratios of decay rates for \({\mathcal{R}}_{K e 3 / K2\pi}\) ,
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Article
Measurement of the K S mean lifetime from π+π− and π0π0 decays using K L decays to determine the acceptance
A precision measurement of the K S mean lifetime has been performed by comparing, in the same experimental setup, the distributions of two-pion decays of neutral kaons produced by high energy prot...
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Article
Measurement of the branching ratio of the double Dalitz decayK L →e+e−e+e− and the CP parity of theK L -meson
Data from the NA31 experiment at CERN have been used to measure the branching ratio of the double Dalitz decay of the long-lived neutral kaon. Eight events have been found with negligible background. The measu...
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Article
Prompt neutrino results from a proton beam dump experiment
A study of prompt neutrino events from 400 GeV protons on a beam-dump is presented. The ratio of electron- to muon-neutrino rates is 0.86±0.14, in agreement withe−μ universality. The anti-neutrino to neutrino flu...
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Article
A measurement of differential cross-sections and nucleon structure functions in charged-current neutrino interactions on iron
A high-statistics measurement of the differential cross-sections for neutrino-iron scattering in the wide-band neutrino beam at the CERN SPS is presented. Nucleon structure functions are extracted and theirQ 2 ev...
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Ion Beam-Plasma Interaction for Particle Driven Fusion
The interaction of energetic multicharged ion beams with separately produced target plasmas is investigated within a projectile ion-target electron binary pattern. The validity conditions of the relevant stand...
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Article
Experimental observation of enhanced stop** of heavy ions in a hydrogen plasma
Enhanced energy loss of 333 MeV 238Uions in a hydrogen discharge plasma with a high degree of ionization has been observed. The ion stop** in a plasma environment exceeds the stop** in cold matter by more th...
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Article
Total neutrino and antineutrino charged current cross section measurements in 100, 160, and 200 GeV narrow band beams
Neutrino and antineutrino total charged current cross sections on iron were measured in the 100, 160, and 200 GeV narrow band beams at the CERN SPS in the energy range 10 to 200 GeV. Assuming σ/E to be constant, ...
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Article
Are there “prompt” like-sign dimuons?
From exposures of the CDHS detector at the CERN SPS we have obtained 367μ + μ − events in neutrino beams and 73μ + μ + events in an antineutrino beam. The magnitude of a prompt like-sign signal has been controver...
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Article
Measurement of the neutral to charged current cross section ratios in neutrino and antineutrino nucleon interactions and determination of the Weinberg angle
The cross section ratios of neutral and charged current interactions induced by neutrinos and antineutrinos in iron have been measured in the 200 GeV narrow-band beam at the CERN SPS. We findR
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Article
Measurement of neutrino and antineutrino structure functions in hydrogen and iron
The CDHS neutrino detector has been used to measure events originating in a tank of liquid hydrogen and in the iron of the detector. Total cross-sections, differential cross-sections, and structure functions a...
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Article
Neutrino and antineutrino charged-current inclusive scattering in iron in the energy range 20<E v <300 GeV
Inclusive charged-current interactions of high-energy neutrinos and antineutrinos have been studied with high statistics in a counter experiment at the CERN Super Proton Synchrotron. The energy dependence of t...
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Article
Determination of the gluon distribution in the nucleon from deep inelastic neutrino scattering
The observed scaling violations of the nucleon structure functionF 2 and \(\bar q\) have been analysed in the framew...
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Article
Tests of QCD and non-asymptotically-free theories of the strong interaction by an analysis of the nucleon structure functionsx F 3,F 2, and \(\bar q\)
The scaling violations of the structure functionsF 2,xF 3, and \(\bar q\) , as measured in deep-inelastic neutrino-nu...
