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Flavor-changing neutral-current decays in top-specific variant axion model
Journal of High Energy Physics
The invisible variant axion model is very attractive as it is free from the domain wall problem. This model requires two Higgs doublets at the electroweak scale where one Higgs doublet carries a nonzero Peccei-Quinn (PQ) charge and the other is neutral under the PQ U(1) symmetry. We consider the most interesting and less constrained scenario of the variant axion model, where only the right-handed top quark is charged under the PQ symmetry and couples with the PQ-charged Higgs doublet. As adoi:10.1007/jhep11(2015)057 fatcat:6tjdkgykebgvdoxo2tskomanvy