René Sondenheimer (Graz)
René Sondenheimer (Graz)
Physical observables in Brout-Englert-Higgs theories We will use the method proposed by Fröhlich, Morchio, and Strocchi to analyze the spectrum of gauge theories with a Brout-Englert-Higgs mechanism. This formalism relates gauge-invariant bound state operators to invariant objects of the remaining unbroken gauge group after gauge fixing which provides a strict gauge-invariant formulation of the latter