Speaker
Dr
Yuji Omura
(KIAS)
Description
We present flavor models for leptophobic $Z^{'}$ with flavor dependent
couplings to the right-handed up-type quarks in the standard model, which can accommodate the recent data on the top forward-backward
asymmetry and the dijet resonance reported by CDF Collaboration.
Such flavor-dependent charge assignments generally require extra chiral fermions for anomaly free and extra Higgs doublets for realistic mass matrices. We also discuss the extra higgs contributions to the top forward-backward asymmetry, and notice that they may be required to avoid the constraint from the cross sections involving top quark, such as the same-sign top process. We also show that the extension could realize cold dark matter candidates.