Complete fermionic two-loop results for the M_W-M_Z interdependence

Details Complete fermionic two-loop results for the M_W-M_Z interdependence Complete fermionic two-loop results for the M_W-M_Z interdependence

2000-07-10

arxiv.org/abs/hep-ph/0007091v3

Phys.Lett.B495:338-346,2000; Erratum-ibid.B570:260-264,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages; error in the numerical evaluation of a specific two-loop vacuum integral corrected

Scientific paper

10.1016/S0370-2693(00)01263-6

The complete fermionic two-loop contributions to the prediction for the W-boson mass from muon decay in the electroweak Standard Model are evaluated exactly, i.e. no expansion in the top-quark and the Higgs-boson mass is made. The result for the W-boson mass is compared with the previous result of an expansion up to next-to-leading order in the top-quark mass. The predictions are found to agree with each other within about 5 MeV. A simple parameterization of the new result is presented, approximating the full result better than 0.4 MeV for M_H < 1 TeV.

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