Showing papers by "G. Mirabelli published in 1998"
TL;DR: In this article, the formation of the η′ in the reaction e+e−→e+e −η−η′→e−π+π−γ has been measured by the L3 detector at a centre-of-mass energy of 91 GeV.
75 citations
TL;DR: In this paper, the anomalous magnetic and electric dipole moments of the tau were determined to be a τ = 0.004±0.023; d τ =(0.0±1.5±1)×10 −16 e· cm.
57 citations
TL;DR: In this article, the number of light neutrino species was determined by measuring the cross section of single photon production in collision near the resonance near the Zo resonance, and the decay width into invisible particles was measured.
31 citations
TL;DR: In this article, a measurement of the included charmless semileptonic branching fraction of beauty hadrons was performed using almost two million hadronic Z decays collected by the L3 experiment at LEP, yielding the result: Br(b → Xulν) = (3.3 ± 1.0 × 1.7) × 10-3.
24 citations
TL;DR: In this article, the authors measured the longitudinal polarisation as a function of the production polar angle using the L3 detector at LEP between 1990 and 1995, corresponding to an integrated luminosity of 149 pb$^{-1}, and obtained the value of the effective weak mixing angle.
20 citations
TL;DR: In this article, an analysis of single and multi-photon events with missing energy is performed using data collected with the L3 detector at LEP at centre-of-mass energies around 183 GeV, for a total of 55.3 pb−1 of integrated luminosity.
19 citations
TL;DR: A search for the Standard Model Higgs boson was carried out on data collected by the L3 detector at a center-of-mass energy of $189 \mathrm{\ Ge\kern -0.1em V} as mentioned in this paper.
18 citations
TL;DR: In this paper, a study of single W boson production in a data sample collected by the L3 detector at center-of-mass energies from 130 to 183 GeV was conducted.
13 citations
TL;DR: In this article, a measurement of the weak anomalous magnetic dipole moment and the weak electric dipole moments of the lepton lepton was performed using angular distributions in the L3 experiment at LEP from 1991 to 1995 at energies around the $\Zo$ mass.
13 citations
TL;DR: An upper limit on the lifetime difference of short and long-lived mesons was obtained using an inclusive bottom hadron sample from 2 million hadronic Z decays collected by the L3 experiment at LEP as mentioned in this paper.
13 citations
TL;DR: In this paper, the measurements of hadron and lepton-pair production cross sections were performed with the L3 detector at center-of-mass energies between 130 GeV and 172 GeV.
TL;DR: In this paper, the authors search for anomalous couplings with the L3 detector at LEP and find that no evidence of anomalous effects has been found, and limits at the 95% confidence level are set on the values of the eight possible anomalies.
TL;DR: In this paper, local multiplicity fluctuations in angular phase space intervals are studied using factorial moments measured in hadronic events at s ≃91.2 GeV, which were collected by the L3 detector at LEP.
01 Jan 1998
TL;DR: In this paper, the reactions e+e−→ e−e−e+e+E− and e+ e−→e−μ+μ−, in a single tag configuration, were studied at LEP with the L3 detector.
TL;DR: In this paper, the authors used three techniques to identify leptons from semileptonic B-particle Z decays, including the charge of the lepton in the opposite hemisphere or using a jet-charge technique.
Abstract: Time-dependent \({{\rm B^{0}}\mbox{-}\bar{{\rm B}}^{0}}\) mixing is studied using about two million hadronic Z decays registered by L3 in 1994 and 1995. For this study three techniques are used. Tagging of the b-quark charge at decay time is performed by identifying leptons from semileptonic B decays. The flavour of the b quark at production time is determined from the charge of the lepton in the opposite hemisphere or by using a jet-charge technique. The proper time of the B-particle decay is obtained by reconstructing the production and decay vertices or by a measurement of the lepton impact parameter. The combined result for the frequency of \({{\rm B_d^0}}\) meson oscillations is \(\)
TL;DR: In this article, a search for the lightest neutral scalar and neutral pseudoscalar Higgs bosons in the Minimal Supersymmetric Standard Model is performed on data collected at LEP by the L3 detector at center-of-mass energies 130 GeV = Sqrt(s) = 183 GeV.
01 Jan 1998
TL;DR: In this article, local multiplicity fluctuations in hadronic Z decays are studied using the L3 detector at LEP using the normalised factorial moment method and bunching parameters.
TL;DR: In this paper, the Michel parameters and the average tau-neutrino helicity have been measured by analysing tau decay spectra in 147 pb −1 of data collected by the L3 detector.
Journal Article•