https://bura.brunel.ac.uk/bitstream/2438/20604/1/FullText.pdf

Precision electroweak measurements on the Z resonance

We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. The data consist of 17 million Z decays accumulated by the ALEPH, DELPHI, L3 and OPAL experiments at LEP, and 600 thousand Z decays by the SLD experiment using a polarised beam at SLC. The measurements include cross-sections, forward-backward asymmetries and polarised asymmetries. The mass and width of the Z boson, $\MZ$ and $\GZ$, and its couplings to fermions, for example the $\rho$ parameter and the effective electroweak mixing angle, are precisely measured. The number of light neutrino species is determined to be 2.9840+/-0.0082. The results are compared to the predictions of the Standard Model. Electroweak radiative corrections beyond the running of the QED and QCD coupling constants are observed with a significance of five standard deviations, and in agreement with the Standard Model. Of the many Z-pole measurements, the forward-backward asymmetry in b-quark production shows the largest difference with respect to its Standard Model expectation, at the level of 2.8 standard deviations. Through radiative corrections evaluated in the framework of the Standard Model, the masses of the top quark and the W Boson are predicted. These indirect constraints are compared to the direct measurements, providing a stringent test of the Standard Model. Using in addition the direct measurements of $\Mt$ and $\MW$, the mass of the as yet unobserved Standard Model Higgs boson is predicted.

Precision Electroweak Measurements on the Z Resonance

https://ams.cern.ch/AMS/Publications/AMS-06_PREP_vol366.pdf

The Alpha Magnetic Spectrometer (AMS)on the International Space Station : Part I - results from the test flight on the space shuttle

http://sedici.unlp.edu.ar/bitstream/handle/10915/79995/Documento_completo.pdf?sequence=1

Single- and Multi-Photon Events with Missing Energy in e+e- Collisions at LEP

Antimatter spectrometer (AMS)-02 is a spaceborne magnetic spectrometer designed to measure with accuracies up to one part in 109 the composition of cosmic rays near the Earth. With a large acceptance (5000 cm2 sr), an intense magnetic field from a superconducting magnet (0.7 T) and an accurate particle identifications AMS-02 will provide the highest accuracy in cosmic rays measurements up to the TeV region. During a 3-year long mission on the International Space Station (ISS) AMS-02 will achieve a sensitivity to the existence of anti-He in the cosmic rays of one part in a billion as well as important informations on the origin of Dark Matter. We review the status of the construction of the AMS-02 experiment in preparation for the 3-year mission on the ISS.

/pdf/the-antimatter-spectrometer-ams-02-a-particle-physics-3dmy9jbbz7.pdf

The antimatter spectrometer (AMS-02): A particle physics detector in space

The design and construction of the silicon strip microvertex detector (SMD) of the L3 experiment at LEP are described. We present the sensors, readout electronics, data acquisition system, mechanical assembly and support, displacement monitoring systems and radiation monitoring system of the recently installed double-sided, double-layered SMD. This detector utilizes novel and sophisticated techniques for its readout.

/pdf/the-l3-silicon-microvertex-detector-271gqiw5mo.pdf

The L3 silicon microvertex detector

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The L3 silicon microvertex detector