7 research outputs found

    A Measurement of Pi-Polarization at Lep

    Get PDF
    Contains fulltext : 26223.pdf (publisher's version ) (Open Access

    ISOLATED HARD PHOTON-EMISSION IN HADRONIC Z0 DECAYS

    No full text

    INCLUSIVE SEARCH FOR THE CHARMLESS RADIATIVE DECAY OF THE B-QUARK (B-]S-GAMMA)

    No full text

    B-ASTERISK PRODUCTION IN Z-DECAYS AT LEP

    No full text

    AN S-MATRIX ANALYSIS OF THE Z-RESONANCE

    No full text

    MEASUREMENT OF CROSS-SECTIONS AND LEPTONIC FORWARD-BACKWARD ASYMMETRIES AT THE Z-POLE AND DETERMINATION OF ELECTROWEAK PARAMETERS

    No full text

    Determination of the number of light neutrino species

    Get PDF
    The cross-section for e+e− → hadrons in the vicinity of the Z boson peak has been measured with the ALEPH detector at the CERN Large Electron Positron collider, LEP. Measurements of the Z mass, Mz = (91.174±0.070) GeV, the Z width Γz=(2.68±0.15) GeV, and of the peak hadronic cross-section, σhadpeak=(29.3±1.2) nb, are presented. With the constraints of the standard electroweak model, the number of light neutrino species is found to be Nv=3.27±0.30. this results rules out of the possibility of a fourth type of light neutrino at 98% CL
    corecore