منابع مشابه
Precision Electroweak Experiments at Lep
During the operation of the LEP e + e ? collider at the Z resonance from 1989 to 1995 the four experiments ALEPH, DELPHI, L3 and OPAL have collected about 16 million decays of the Z into hadrons and charged leptons. The precise measurements of the total cross section allow an accurate determination of the properties of the Z. Including data up to 1994 one obtains for the mass, the total and par...
متن کاملPrecision Electroweak Physics at Lep
Progress in precisionmeasurements of electroweak observables at LEP continues steadily. The highlights of 1993 are: a new scan of the Z line shape with precise beam energy determination by resonant depolarization, leading to a measurement of the Z width with 1:5 10 3 precision; rst results on absolute cross sections with high-precision luminosity monitors; high e ciency b-tagging with microvert...
متن کاملStandard Model Electroweak Measurements at Lep
Electron-positron collision allow a detailed investigation of the standard model (SM) thanks to their clean experimental conditions. The Large Electron-Positron collider (LEP) was operated at CERN for about 12 years (1989 2000) at increasing center of mass energies ( √ s): both at the Z pole ( √ s ≈ 91 GeV) and beyond ( √ s = 160-209 GeV). Its maximum instantaneous luminosity was 0.5-1 10 cm s ...
متن کاملPrecision Tests of the Electroweak Interactions at Lep / Slc
This paper is an updated version of the invited plenary talk given at the XXII Physics in Collision Conference at Stanford, (June 2002). The measurements performed at LEP and SLC have substantially improved the precision of the tests of the Minimal Standard Model. The precision is such that there is sensitivity to pure weak radiative corrections. This allows to indirectly determine the top mass...
متن کاملElectroweak Corrections Uncertainty on the W Mass Measurement at Lep
The systematic uncertainty on the W mass and width measurement resulting from the imperfect knowledge of electroweak radiative corrections is discussed. The intrinsic uncertainty in the 4-f generator used by the DELPHI Collaboration is studied following the guidelines of the authors of YFSWW, on which its radiative corrections part is based. The full DELPHI simulation, reconstruction and analys...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2002
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(02)90054-x