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The ALEPH Apparatus and INFN commitments

The ALEPH Apparatus and INFN commitments. Hadron Calorimeter, Muon Chambers, Vertex Detector contributions to the design and construction of the TPC and the SICAL luminosity monitor. About 400 physicists took part in Aleph (18% from INFN). Bari, Firenze, Pisa.

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The ALEPH Apparatus and INFN commitments

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  1. The ALEPH Apparatus and INFN commitments Hadron Calorimeter, Muon Chambers, Vertex Detector contributions to the design and construction of the TPC and the SICAL luminosity monitor About 400 physicists took part in Aleph (18% from INFN) Bari, Firenze, Pisa Silicon Detectors, Power Supplies, General Design and Construction Milano, Pisa, Trieste Readout processors at LEP1 Bari, Frascati, Pisa The entire subdetector Bari, Frascati, Pisa Pisa SICAL: 1/3 of the silicon detectors

  2. ALEPH : data taking at LEP From 1989 to 2000 The ALEPH Vertex Detector

  3. The Number of Light Neutrino Species Hadronic Z cross section as a function of the centre-of-mass energy

  4. The electroweak mixing angle - The tau polarization The Z->bb forward-backward asymmetry The polarization of the tau lepton as a function of the polar angle The forward-backward charge flow for events with leptons

  5. Discovery of b Baryons (1991) First evidence of an excess of right-sign combinations in Lambda – lepton events produced in hadronic Z decays ALEPH

  6. First Measurement of the Bs meson mass (1993)

  7. First Observation of the time dependence of oscillations (1993)

  8. Upper limit on the Bs oscillation frequency (2002) Highest weight in the present (Jan 2005) World Average for Dms

  9. Upper limit on the tau neutrino mass (1995) Present best world limit from t -> 3pnt and t -> 5p(p0)nt decays (Visible energy)/(E beam) vs Visible Invariant Mass

  10. Lower Limit on the mass of the Lightest Supersymmetric Particle (LSP, a candidate for Dark Matter) In the framework of MSSM With R-parity conservation

  11. Search for the Standard Model Higgs boson Higgs candidate collected at LEP centre-of-mass energy of about 207 GeV (year 2000) Log-likelihood ratio of (signal+background) and (bgnd only) hypotheses. A ~ 3s excess is observed around 115 GeV/c2

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