Abstract
In the context of electroweak precision observables the W boson mass, being highly sensitive to loop corrections of new physics, plays a crucial role. The accuracy of the measurement of the W boson mass has been significantly improved over the last years (particularly by the Tevatron results) and further improvement of the experimental accuracy is expected from future LHC and ILC measurements. In order to fully exploit the precise experimental determination, an accurate theoretical prediction for the W boson mass in models beyond the SM is of central importance. In this chapter we present the currently most precise prediction of the W boson mass in the MSSM with complex parameters and in the NMSSM, including the full one-loop result and the relevant available higher order corrections of SM and SUSY type. The evaluation of the W boson mass is performed in a very flexible framework, which facilitates the extension to other models beyond the SM. The size of the contribution of the various SUSY sectors in both models is studied in detail. Performing a detailed parameter scan in the MSSM, we investigate the impact of limits from direct SUSY searches as well as from the Higgs discovery on the W boson mass prediction in the MSSM. Assuming hypothetical future scenarios, we discuss the impact of the W boson mass prediction on the MSSM parameter space. A significant part of this chapter concerns the discussion of genuine NMSSM contributions to the W boson mass.
Published Version
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