Abstract: The m<inf>W</inf> − m<inf>Z</inf> interdependence in the Standard Model is studied in the MS¯ scheme at the two-loop level, including the known higher-order contributions. The relevant radiative parameters, (Formula presented.) are computed at O(α<sup>2</sup>) taking into account higherorder QCD corrections and the resummation of the reducible contributions. We obtain m<inf>W</inf> = 80.357 ± 0.009 ± 0.003 GeV where the errors refer to the parametric and theoretical uncertainties, respectively. A comparison with the known result in the On-Shell scheme gives a difference of ≈ 6 MeV. As a byproduct of our calculation we also obtain the MS¯ electromagnetic coupling and the weak mixing angle at the top mass scale, (Formula presented.) and (Formula presented.).
|Titolo:||The mW- mZ interdependence in the Standard Model: a new scrutiny|
|Data di pubblicazione:||2015|
|Citazione:||Degrassi, G., Gambino, P., & Giardino, P.P. (2015). The mW- mZ interdependence in the Standard Model: a new scrutiny. JOURNAL OF HIGH ENERGY PHYSICS, 2015(5).|
|Appare nelle tipologie:||1.1 Articolo in rivista|