Dynamical Gauge Symmetry Breadown Associated with Chiral Dymmetry Breaking(§7. Dynamical Symmetry Breaking and Sigma/Higgs-Boson,Possible Existence of the σ-Meson and Its Implications to Hadron Physics)

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Recently we found a rather general method for calculating an effective action for massless gauge theory without scalar fields, in which only fermions acquire their masses while gauge bosons do not. Upon performing the calculation, we used the functional integration and the Fierz-transformation and also introduced the gaussian quadratic bilocal auxiliary fields. Here we applied this technique to an example of gauge symmetry breakdown from SU(5) to SU(4). Though this breaking pattern was intuitively discussed by Raby, Dimpoulos and Susskind long ago, they did not derive various physical quantites. We developed their idea and calculated them as well as the generated gauge boson masses.
素粒子論グループ素粒子研究編集部の論文
2001-02-20