SU(5)-Compatible Yukawaon Model

Details SU(5)-Compatible Yukawaon Model SU(5)-Compatible Yukawaon Model

2011-06-06

arxiv.org/abs/1106.0971v2

IJMP A, 27 (2012) 1250028

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 1 fugure, minor improvements

Scientific paper

10.1142/S0217751X12500285

It is investigated what constraints are imposed on the so-called yukawaon model when we regard quarks and leptons as $(\bar{\bf 5}_i+{\bf 10}_i+{\bf 1}_i)$ of SU(5) ($i=1,2,3$: index of U(3) family symmetry). In past yukawaon models, the effective Yukawa coupling constants $Y_f^{eff}$ are given by vacuum expectation values of fields $Y_f$ ("yukawaons") as $(Y_f^{eff})_{ij}= (y_f/\Lambda)<(Y_f)_{ij}>$. In order to build a model without a cutoff scale $\Lambda$, vector-like fields $(\bar{\bf 5}^i+{\bf 10}^i+{\bf 5}_i +\bar{\bf 10}_i)$ are introduced in addition to the conventional quarks and leptons. The U(3) family symmetry is broken at $\sim 10^{13}$ GeV.

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