Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-08-19
Physics
High Energy Physics
High Energy Physics - Phenomenology
40 pages, 10 figures, added 1 figure and extended discussion, accepted for publication in JHEP
Scientific paper
We present U(1) 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 (FB) asymmetry and the dijet resonance associated with a W boson reported by CDF Collaboration. Such flavor-dependent leptophobic charge assignments generally require extra chiral fermions for anomaly cancellation. Also the chiral nature of U(1)' flavor symmetry calls for new U(1)'-charged Higgs doublets in order for the SM fermions to have realistic renormalizable Yukawa couplings. The stringent constraints from the top FB asymmetry at the Tevatron and the same sign top pair production at the LHC can be evaded due to contributions of the extra Higgs doublets. We also show that the extension could realize cold dark matter candidates.
Ko Pyungwon
Omura Yuji
Yu Chaehyun
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