Observation of the muonic decay of the charged intermediate vector boson W+-

SIGLEAvailable from the library of Aachen Technische Hochschule (DE) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Fast online track finding for the muon trigger in the UA1 experiment

A microprocessor system will be used to trigger on high energetic muons in the UA1 experiment. The system consists of MC 68000 microprocessors. Six of them work in parallel for a first online track finding and one as supervisor to take the final trigger decision. To reduce the input rate for the microprocessors, very fast prefiltering is done by a specially constructed hardware trigger. (0 refs)

Observation of the muonic decay of the charged intermediate vector boson

Muons of high transverse momentum pμ T have been observed in the large drift chambers surrounding the UA1 detector at the CERN 540 GeV pp̄ collider. For an integrated luminosity of 108 nb-1, 14 isolated muons have been found with pT > 15 GeV/c. They are correlated with a large imbalance in total transverse energy, and show a kinematic behaviour consistent with the muonic decay of the Intermediate Vector Boson W± of weak interactions. The partial cross section is in agreement with previous measurements for electronic decays and with muon-electron universality. The W mass is determined to be mW = 81+6 -7 GeV/c2. © 1984

Observation of muonic ZO-decay at the p̄p collider

We report the observation of five muonic Z0 decays. The mass and cross section times branching ratio is consistent with the previous measurements of Z0→e+e-. Three of the muonic decays have unexpected features. One event is of the type Z0→μ+μ-γ. Two of the Z0→μ+μ- decays are accommpanied by several (>4) energetic (ET > 10 GeV) jets which are difficult to explain within the framework of standard QCD corrections. © 1984