Abstract
Electroweak precision tests of the Standard Model of the fundamental interactions are reviewed ranging from the lowest to the highest energy experiments. Results from global fits are presented with particular emphasis on the extraction of fundamental parameters such as the Fermi constant, the strong coupling constant, the electroweak mixing angle, and the mass of the Higgs boson. Constraints on physics beyond the Standard Model are also discussed.
Highlights
The Standard Model (SM) of the electroweak (EW) interactions has been developed mostly in the 1960s, where the gauge group SU (2)L × U (1)Y was suggested [1], the Higgs mechanism for spontaneously broken gauge theories developed, and the model for leptons constructed explicitly [2]
The previous decade added precision measurements in the neutrino and quark sectors, as well as ultra-high precision determinations of the W -boson mass, MW [5], the anomalous magnetic moment of the muon [6], and the Fermi constant, GF [7]. These results suggest that the new physics must be separated by at least a little hierarchy from the EW scale unless one considers the possibility that a conspiracy is at work
QpW is scattering similar to the weak charges of heavy nuclei measured in atomic parity violation (APV) but at a different kinematics
Summary
The Standard Model (SM) of the electroweak (EW) interactions has been developed mostly in the 1960s, where the gauge group SU (2)L × U (1)Y was suggested [1], the Higgs mechanism for spontaneously broken gauge theories developed, and the model for leptons constructed explicitly [2]. √ The Higgs vacuum expectation value is given by 0|H|0 = ( 2GF )−1/2 = 246.22 GeV This measurement is so precise that even the error in the definition of the atomic mass unit (u) can shift GF (MuLan quotes GF = 1.1663788(7) × 10−5 GeV−2). We stress that the precise impact of these effects need to be evaluated carefully by the collaboration with a new and self-consistent set of PDFs, including new radiative corrections, while simultaneously allowing isospin breaking and asymmetric strange seas. This effort is currently on its way
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