Electroweak Measurements on the Z Resonance

نویسنده

  • David Strom
چکیده

Almost all precision electroweak measurements from the Z resonance made at the LEP storage ring by the ALEPH, DELPHI, L3 and OPAL experiments and those made using a polarized electron beam at the SLC by the SLD experiment are now final and have been published. Changes in the measurements since the last RADCOR meeting are discussed. The internal consistency of the measurements is considered. The impact of remaining theoretical uncertainties in the QCD sector are examined as well as the impact of experimental and theoretical uncertainties on the value of αQED(mZ).

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Electroweak Precision Tests at GigaZ

By running the prospective high-energy ee collider TESLA in the GigaZ mode on the Z resonance, experiments can be performed on the basis of more than 10 Z events. This will allow the measurement of the effective electroweak mixing angle to an accuracy of δ sin θeff ≈ ±1×10. The W boson mass is likewise expected to be measurable with an error of δMW ≈ ±6 MeV near the WW threshold. We review the ...

متن کامل

Precision Electroweak Tests of the Standard Model

The present status of precision electroweak data is reviewed. These data include measurements of ee → ff , taken at the Z resonance at LEP, which are used to determine the mass and width of the Z boson. In addition, measurements have also been made of the forward-backward asymmetries for leptons and heavy quarks, and also the final state polarisation of the τ -lepton. At SLAC, where the electro...

متن کامل

Tests for a Strong Electroweak Sector at Future e+e− High Energy Colliders

The study of the scattering at high energy of the gauge bosons W and Z, in particular longitudinally polarized W and Z, can clarify the mechanism of spontaneous symmetry breaking in the Standard Model of the electroweak interactions. Different models of strong electroweak sector, based on the effective lagrangian approach are briefly reviewed. They include models with no resonance, with scalar ...

متن کامل

Electroweak Results from the Z Resonance Cross-sections and Leptonic Forward-backward Asymmetries with the Aleph Detector

From 1990 to 1995 the LEP ee storage ring was operated at centre of mass energies close to the Z mass, in the range | √ s − MZ| < 3 GeV. Most of the data have been recorded at the maximum of the resonance (120 pb per experiment) and about 2 GeV below and above (40 pb per experiment). The measurement of the hadronic and leptonic cross sections as well as the leptonic forward backward asymmetries...

متن کامل

Extraction of αs and constraint on the Higgs mass from Electroweak fits at the Z resonance

The determination of the Z lineshape parameters at LEP1 is presented and the value of αs(M 2 Z) is derived from these measurements. The constraint on the Higgs mass obtained from a global fit to LEP1 and SLC data is also given. Talk given at the 10th International Seminar “QUARKS’ 98” Suzdal, Russia, May 18-24, 1998 e-mail: [email protected]

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2001