282
P. Jenni and T. S. Virdee
Fig. 6.7 A comparison of cross-section measurements for electroweak and QCD processes with
theoretical predictions from the SM, shown here as example from the ATLAS experiment
theorists, other collider experiments at LEP, Tevatron, HERA, b-factories and to the
good preparation of the ATLAS and CMS experiments.
In what follows the production of b-bar, τ + τ − , W + W − , etc. will be denoted by
bb, ττ, WW ( ∗ ) , etc.
Using all the data so far collected extensive searches for new physics, beyond
the standard model, have been performed. No new physics beyond the SM has yet
been discovered. Limits have been set on e.g. quark substructure, supersymmetric
particles (e.g. disfavouring gluino masses below 1.5 TeV in simple models of
supersymmetry), potential new bosons (e.g disfavouring new heavy SSM W and Z
bosons with masses below 3 TeV for couplings similar to the ones for the known W
and Z bosons) and semi-classical black holes in the context of large extra dimensions
(with masses below 10 TeV).
6.7 The Discovery and Properties of a Higgs Boson
Undoubtedly, the most striking result to emerge from the ATLAS and CMS
experiments is the discovery of the Higgs boson at a mass of ~125 GeV [19] and
[20], respectively.
P. Jenni and T. S. Virdee
Fig. 6.7 A comparison of cross-section measurements for electroweak and QCD processes with
theoretical predictions from the SM, shown here as example from the ATLAS experiment
theorists, other collider experiments at LEP, Tevatron, HERA, b-factories and to the
good preparation of the ATLAS and CMS experiments.
In what follows the production of b-bar, τ + τ − , W + W − , etc. will be denoted by
bb, ττ, WW ( ∗ ) , etc.
Using all the data so far collected extensive searches for new physics, beyond
the standard model, have been performed. No new physics beyond the SM has yet
been discovered. Limits have been set on e.g. quark substructure, supersymmetric
particles (e.g. disfavouring gluino masses below 1.5 TeV in simple models of
supersymmetry), potential new bosons (e.g disfavouring new heavy SSM W and Z
bosons with masses below 3 TeV for couplings similar to the ones for the known W
and Z bosons) and semi-classical black holes in the context of large extra dimensions
(with masses below 10 TeV).
6.7 The Discovery and Properties of a Higgs Boson
Undoubtedly, the most striking result to emerge from the ATLAS and CMS
experiments is the discovery of the Higgs boson at a mass of ~125 GeV [19] and
[20], respectively.