Electroweak precision constraints at present and future colliders
  We revisit the global fit to electroweak precision observables in the Standard Model and present model-independent bounds on several general new physics scenarios. We present a projection of the fit based on the expected experimental improvements at future $e^+ e^-$ colliders, and compare the constraining power of some of the different experiments that have been proposed. All results have been obtained with the HEPfit code. 
Jorge de Blas, Marco Ciuchini, Enrico Franco, Satoshi Mishima,   Maurizio Pierini, Laura Reina, Luca Silvestrini
hep-ph hep-ex