Gauge Symmetry Breaking: Higgs-less Mass Generation and Radiation Phenomena
Abstract
Description
Gauge symmetries generally appear as a constraint algebra, under which one expects all physical states to be singlets. However, quantum anomalies and boundary conditions introduce central charges and change this picture, thus causing gauge/diffeomorphism modes to become physical. We expose a cohomological (Higgs-less) generation of mass in U(N)-gauge invariant Yang-Mills theories through non-trivial representations of the gauge group. This situation is also present in black hole evaporation, where the Virasoro algebra turns out to be the relevant subalgebra of surface deformations of the horizon of an arbitrary black hole.
10 pages, LaTeX, contribution to the conference "Symmetries in Gravity and Field Theory", dedicated to Jose Adolfo de Azcarraga Feliu on the occasion of his 60th birthday, Salamanca 9 -11 June 2003, Spain
10 pages, LaTeX, contribution to the conference "Symmetries in Gravity and Field Theory", dedicated to Jose Adolfo de Azcarraga Feliu on the occasion of his 60th birthday, Salamanca 9 -11 June 2003, Spain