Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-04-11
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, Talk given at the 2002 International Workshop On "Strong Coupling Gauge Theories and Effective Field Theories" (SCGT
Scientific paper
We study the dynamical electroweak symmetry breaking (DEWSB) in the $D (=6,8,...)$-dimensional bulk with compactified extra dimensions. We identify the critical binding strength for triggering the DEWSB, based on the ladder Schwinger-Dyson equation. In the top mode standard model with extra dimensions, where the standard model gauge bosons and the third generation of quarks and leptons are put in the bulk, we analyze the most attractive channel (MAC) by using renormalization group equations (RGEs) of (dimensionless) bulk gauge couplings and determine the effective cutoff where the MAC coupling exceeds the critical value. We then find that the top-condensation can take place for D=8. Combining RGEs of top-Yukawa and Higgs-quartic couplings with compositeness conditions, we predict the top mass, $m_t=173-180$ GeV, and the Higgs mass, $m_H=181-211$ GeV, for D=8, where we took the universal compactification scale $1/R = 1-100$ TeV.
Hashimoto Michio
Tanabashi Masaharu
Yamawaki Koichi
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