Fits of a contact-interaction parameter to LEP Bhabha data yield deviations above 3σ in several models, but the overall fits are poor and only statistical uncertainties are considered.
Tests of the standard model and constraints on new physics from measurements of fermion-pair production at 130–172 GeV at lep
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New test on contact interactions in the data at $\sqrt{s}$ 130-207GeV by Bhabha scattering process $e^+e^-\to e^+e^-$
Fits of a contact-interaction parameter to LEP Bhabha data yield deviations above 3σ in several models, but the overall fits are poor and only statistical uncertainties are considered.