Showing papers by "G. Chiefari published in 1991"
TL;DR: In this article, the authors show the context of analysis and the first results of a research on media temporalities of the elderly, showing that the global relation of the autonomous elderly persons to the media can evolve when confronted to their new temporal framework and the new program offer, whereas their representations and use of the media remain quite stable.
146 citations
TL;DR: In this article, the authors present a study of the inclusive production of neutral pions and charged particles from 112 000 hadronic Z 0 decays and compare their results to e + e − data between √ s = 9 and 91 GeV.
70 citations
TL;DR: In this paper, the decay properties of Z 0 → b b from a study of inclusive muon and electron events were measured, assuming the standard model prediction of Γ bb = 378 ± 3 MeV with an additional 19 MeV error from the uncertainty in BR (b → l + X).
59 citations
TL;DR: In this paper, the authors have studied the reactionse+e−→hadrons,e+e −, μ+ μ− and τ+ τ−, in the energy range 88.2 ± 2.5 pb−1.
Abstract: We have studied the reactionse+e−→hadrons,e+e−, μ+ μ− and τ+ τ−, in the energy range 88.2\( \leqq \sqrt s \leqq 94.2\) GeV. A total luminosity of 5.5 pb−1, corresponding to approximately 115000 hadronic and 10000 leptonicZ0 decays, has been recorded with the L3 detector. From a simultaneous fit to all of our measured cross section data, we obtain assuming lepton universality:
$$\begin{gathered} M_z = 91.181 \pm 0.010 \pm 0.02 (LEP) GeV, \hfill \\ \Gamma _z = 2501 \pm 17 MeV, \hfill \\ \Gamma _{had} = 1742 \pm 19 MeV, \Gamma _t = 83.6 \pm 0.8 MeV. \hfill \\ \end{gathered}$$
53 citations
TL;DR: In this article, the authors present a study of energy-energy correlations based on 83 000 hadronic Z0 decays and determine the strong coupling constant αs to second-order QCD: αs(91.2 GeV)=0.121±0.1 s.
43 citations
TL;DR: In this paper, the authors measured the coupling strength of bottom quarks and light quarks at the Z0 resonance, in order to test the flavour independence of the strong interaction.
28 citations
TL;DR: In this paper, a study of 43, 000 3-jet events from Z0 boson decays is presented, where the measured jet energy distributions and the event orientation are reproduced by second order QCD.
28 citations
TL;DR: In this article, the authors search for direct leptoquark production in Z0 decays from a scan of the Z0 resonance, in the energy range 88.2 ⩽ √s⩽ 94.2 GeV, using 5.2 pb−1 of data.
22 citations
TL;DR: In this article, the neutral Higgs boson produced in decays of the Z0 through the process e+e-→Z0→H0Z0 was searched for.
20 citations
TL;DR: In this article, the τ-lepton branching fractions were determined from 2540 Z0 → τ+τ− events and the τ lifetime was determined from three-prong decay using the decay length and from one-part decays using the impact parameter.
19 citations
TL;DR: In this paper, the lifetime of B-hadrons produced in e + e − collisions at the Z 0 was measured to be 1.32±0.08 (stat.)± 0.09(syst.) ps.
TL;DR: In this paper, the authors search for lepton flavour violation in Z 0 boson decays into lepton pairs, Z 0 →μτ, Z0 →eτ, and Z 0→eμ.
TL;DR: In this article, the authors search for new resonances, Y, with mass MY, in the range from 30 to 89 GeV, produced via the reaction e+e- → Z0 →γY, where Y subsequently decays into e+, e-, μ+μ- or hadrons.
01 Jan 1991