CERN Accelerating science

Internal Note
Report number	CERN-ALEPH-2002-039 ; CERN-ALEPH-PHYSICS-2002-015 ; DELPHI-2002-096-PHYS-926 ; CERN-DELPHI-2002-096-PHYS-926 ; L3-Note-2785 ; OPAL-TN-727 ; LEP2FF-02-03
Title	Combination of the LEP II ffbar Results
Author(s)	Geweniger, C ; Bourilkov, D ; Elsing, M ; Goy, C ; Holt, J ; Liebig, W ; Minard, M N ; Renton, P B ; Riemann, S ; Sachs, K ; Ward, P ; Wynhoff, S
Submitted by	7 Oct 2002
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LEP ; DELPHI
Free keywords	EW line-shape and leptonic asymmetries ; LEP2
Abstract	Preliminary combinations of measurements of the 4 LEP collaborations of the process e+e-->ffbar at LEP-II are presented, using data from the full LEP-II data set where available. Cross-sections and forward-backward asymmetry measurements are combined for the full LEP-II data set. Combined differential cross-sections $\frac{{\rm d}\sigma}{{\rm d}\cos\theta}$ for electron-pairs, muon pair and tau-pair final states are presented. Measurements of the production of heavy flavours are combined. The combined results are interpreted in terms of contact interactions and the exchange Z' bosons and leptoquarks, and within models of low scale gravity in large extra dimensions.

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