New 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.
New Results On Inverse Muon Decay and Low Multiplicity Reactions / B., A., E., A., R., B., F. W., B., A., C., M., C., A. G., C., D., D., E., D., U., D., B., E., A., E., D., F., Fiorillo, G., W., F., C., F., A., F., L., G., P., G., G., G., et al.. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - ELETTRONICO. - 31:(1993), pp. 293-300. [10.1016/0920-5632(93)90149-Z]
New Results On Inverse Muon Decay and Low Multiplicity Reactions
FIORILLO, GIULIANA;PALLADINO, VITTORIO;
1993
Abstract
New 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
