77 research outputs found
Messung des Wirkungsquerschnitts des inversen Myonzerfalls #nu#_#mu# + e"- -> #mu#"- + #nu#_e
No full textSIGLEAvailable from TIB Hannover: DW 7582 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman
Lippich, George (Death, 1891-09-13)
No full textAddress: 60 Mohawk St.Age at death: 53194/Pg 104/1891/M W M/Germany/Dr. Theo Bange, Cor./Fuldner/Walnut Hills Cem.Original record filed in drawer labeled 'LINE-LOC'
Zur Frage des Harnstoffgehaltes im menschlichen normalen Harn. Eine Erwiderung an Herrn Dr. Fritz Lippich.
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A new determination of the electroweak mixing angle from muon-neutrino-electron scattering
No full textWe are reporting on a new determination of sin2θ{symbol}w from the ratio of vμe to ve scattering cross sections. A new detector designed for this purpose was exposed tothe Wide Band Neutrino Beamof the 450 GeV (CERN SPS. An analysis of data taken in 1987 and 1988 is presented based on 762 vμe and 1017 ve events. From the ratio of σ(vμe) to σ(vμe) we determined sin2θ{symbol}w=0.233±0.012 (stat) ± 0.008 (syst) without radiative correction. With radiative correction for mt=mH=100 GeV we find sin2θ{symbol}w=0.232±0.012(stat) ±0.008(syst). © 1989.0SCOPUS: ar.jinfo:eu-repo/semantics/publishe
New results on inverse muon decay and low multiplicity reactions
No full textNew results on inverse muon decay and coherent charged pion production by neutrinos are presented. The data come from the CHARM-II neutrino detector operated at the CERN wide-band neutrino beam. High-statistics data samples of 14500 inverse muon decay events and 3500 nu(mu)e elastic scattering events allow the determination of the electroweak parameters from the ratio of the cross-sections of neutral-to-charged-current neutrino electron scattering. The best fit values of the electroweak mixing angle sin2 theta(W) and the relative coupling strength rho of neutral and charged current are: sin2 theta(W) = 0.237 +/- 0.014 and rho = 0.987 +/- 0.042. In the second topic, coherent single charged pion production was measured in neutrino and antineutrino beams. The measured cross-sections, averaged over the wide-band beam spectra and the glass target nuclei composition, are: sigma(nu(mu)A --> mu-pi+A) = (51 +/- 10) X 10(-40) cm2 nucleus and sigma(nu(mu)ABAR --> mu+pi-A) = (43 +/- 9) x 10(-40) cm2 nucleus. The energy dependence shows the expected flattering of the cross-sections at high energy
Neutral current coupling constants from neutrino-electron scattering
No full textWe are reporting on a determination of neutral current coupling constants from a study of differential cross sections of muon-(anti)neutrino electron scattering. The results were obtained with the CHARM-II detector which was exposed to the CERN wide band neutrino beam in the years 1987 to 1991. A total of about 3000 nue and 3000 nueBAR scattering events were observed. We present a preliminary value of sin2 theta(W) determined with the ratio of neutrino and antineutrino electron scattering cross-sections, based on the full data sample, and we give a determination of the effective vector and axial-vector neutral current coupling constants and the first measurement of the shape of the y-distributions based on 80% of the total statistics
Neutral-current Coupling-constants From Nu-mu-e- and (nu)bar-mu-e- Scattering
No full textWe report on determinations of the neutral current coupling constants of the electron from the study of muon neutrino and antineutrino scattering off electrons. The results were obtained with the CHARM II detector which was exposed to the CERN wide band neutrino beam during the years 1987 to 1991. We present the determination of g V and g A from the measurement of νμ e and ν̄μ e cross sections with 80% of the data and a preliminary result for sin2θ w from the ratio of νμ e and v̄μ e cross sections, using the full data sample. We furthermore give results from the comparison of neutrino electron scattering with inverse muon decay and present the first measurement of the y‐distributions for νμ e and ν̄μ e scattering. The agreement between our results and those from the measurements at LEP demonstrates the validity of the Standard Model over a range in momentum transfer which spans six orders of magnitude
An Electron Hadron Separator For Digital Sampling Calorimeters
No full textA fast and effective algorithm for electromagnetic and hadronic shower separation has been developed for the digital sampling calorimeter of the CHARM II experiment. It is based on a generalization of the minimal spanning tree concept and can be easily applied to other existing calorimeters. In this particular application, which requires the highest efficiency for retaining electromagnetic showers, one gets, for 99% efficiency, a rejection factor of the order of 100 for hadronic showers
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