Threshold Cross Section at LEP2
نویسنده
چکیده
The rapid increase of the e+e− → W+W− cross section in the threshold region provides a method for measuring MW at LEP2. The dependence of the theoretical cross section — including the effects of the finite W width, Coulomb interactions and initial state radiation — on the collider energy and on the mass and width of theW is investigated in order to deduce the optimal collider energy which maximizes the sensitivity to MW . Statistical and systematic uncertainties are studied in detail. The background contribution from QCD four-jet production is estimated. It is shown that by running LEP2 at √ s ≈ 161 GeV and obtaining a luminosity of order 100 pb−1 per experiment, an uncertainty on the measured value of MW of ±70 MeV should be achievable.
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تاریخ انتشار 1995