2025/07/28 by Hill, Christopher T. · 1 citation
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th)
paper · doi:10.48550/arxiv.2507.21243
In top quark condensation the Brout-Englert-Higgs (BEH) boson is a tt bound state. With a UV completion of a single coloron exchange interaction, a recent semiclassical treatment gave a novel theory of the BEH boson as an extended object with composite scale M0∼ 6 TeV. Presently we obtain the semiclassical theory as an effective action, using the source/Legendre transformation techniques of Jackiw, \etal, and fermion loop effects in the large-Nc limit by deploying an auxiliary field to implement the sum of leading fermion loop diagrams. The theory remains natural at the loop level, with fine tuning at the level of a few %, and the effective coupling of the 4-fermion interaction, g02, is significantly enhanced by quantum loops over the fundamental coloron coupling, g02. Hence a relatively weaker ``topcolor'' theory can produce critical coupling in the effective BEH bound state theory.