The start of the Large Hadron Collider (LHC) at CERN is bringing particle physics to an unprecedented TeV energy frontier, at which some long-standing questions associated with the Standard Model will be answered and new physics might be observed. In 2013 a new boson with a mass of 126 GeV was discovered. This boson might be the Higgs boson, which generates the masses of the weak bosons, or an excitation of the weak neutral boson, if the weak bosons are bound states of smaller constituents.