Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-07-18
Phys.Rev. D56 (1997) 4226-4237
Physics
High Energy Physics
High Energy Physics - Phenomenology
27 pages, uses harvmac.tex, tables.tex
Scientific paper
10.1103/PhysRevD.56.4226
We describe a realistic, renormalizable, supersymmetric ``quindecuplet'' model in which the top quark, left handed bottom quark, and up-type Higgs boson are composite, with a compositeness scale $\sim 1-3$ TeV. The top-Higgs Yukawa coupling is a dynamically generated strong interaction effect, and is naturally much larger than any other Yukawa coupling. The light quark doublets and right-handed up-type quarks are also composite but at higher energies; the hierarchy of quark masses and mixings is due to a hierarchy in the compositeness scales. Flavor changing neutral currents are naturally suppressed, as is baryon number violation by Planck-scale dimension five operators. The model predicts that the most easily observable effects would be on $b$-quark physics and on the $\rho$ parameter. In particular a small negative $\Delta\rho=-\epsilon$ leads to $\Delta R_b> +2\epsilon$. There are effects on $B$ meson mixing and on flavor-changing neutral-current $b$-quark decays to leptons which might be detectable, but not on $b\rightarrow s\gamma$. The model also suggests the supersymmetry-breaking mass for the right handed top squark might be considerably larger than that of the left handed top squark.
Nelson Ann E.
Strassler Matthew J.
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