Showing papers by "G. Mirabelli published in 1996"
TL;DR: The results of the searches for neutral Higgs boson production in the process e + e − → Z ∗ H 0 are reported in this paper, focusing on Higgs Boson masses below 70 GeV.
70 citations
TL;DR: In this paper, the structure of hadronic events recorded by the L3 detector at center-of-mass energies of 130 and 136 GeV was studied and a comparison of the data with resummed O(alpha_s^2) QCD calculations was made.
42 citations
15 Feb 1996-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
41 citations
TL;DR: In this article, measurements of e+e− annihilation into hadrons and lepton pairs were carried out with the L3 detector at LEP at center-of-mass energies between 130 and 189 GeV.
24 citations
TL;DR: In this article, the authors studied the process e+e− → nγ (n ≥ 2) at an average center-of-mass energy of 133 GeV using the L3 detector at LEP.
13 citations
TL;DR: In this article, 1.6 million hadronic Z decays collected with the L3 detector were used to study the production of γ mesons and compare the predictions of different Monte Carlo programs.
10 citations
TL;DR: In this article, the Michel parameters ϱ, η, ξ, and ξδ, the chirality parameter ξ h and the τ polarization P τ are measured using 32012 τ pair decays.
10 citations
TL;DR: A search for the neutral Higgs boson in the processes e−e− → Z → H0γ → q q γ and e+e−→ Z → Z∗H0 → q Q γγ has been performed using 2.8 million hadronic Z decays collected with the L3 detector at LEP from 1991 through 1994 as discussed by the authors.
9 citations
TL;DR: In this article, the charge correlations between the tagged leptons are studied as a function of proper time, and the proper time of the b-hadron decay is measured by reconstructing the production and decay vertices using a silicon microvertex detector.
8 citations
TL;DR: In this article, a 2-jet hadronic Z decays obtained in the data collected between 1991 and 1992 are analyzed, containing electrons, muons and large missing energy (neutrinos), respectively.
Abstract: The inclusive semileptonic branching ratios b→eνX,μ νX,τ νX andνX have been measured at LEP with the L3 detector. The analysis is based on 2-jet hadronic Z decays obtained in the data collected between 1991 and 1992. Three separate event samples are analysed, containing electrons, muons and large missing energy (neutrinos), respectively. From the electron sample, we measure Br(b→eνX)=(10.89±0.20±0.51)% and, from the muon sample, Br(b→μ νX)=(10.82±0.15±0.59)%, where the first error is statistical and the second is systematic. From the missing energy sample, we measure Br(b→νX)=(23.08±0.77±1.24)%, assuming the relative semileptonic decay rates e:μ:τ=1:1:(0.25±0.05), according to theoretical expectations. From a combined analysis of all three samples and constraining the relative semileptonic rates, we measure Br(b→eνX)=Br(b→μ νX)=(10.68±0.11±0.46)%. Alternatively, we can remove the constraint on the relative semileptonic rates and measure Br(b→τ νX)=(1.7±0.5±1.1)%.
3 citations