Flavor-changing radiative decay of the quark
JL Diaz-Cruz, R Martinez, MA Perez, A Rosado - Physical Review D, 1990 - APS
JL Diaz-Cruz, R Martinez, MA Perez, A Rosado
Physical Review D, 1990•APSWe study the loop-induced flavor-changing decay t→ c+ γ in a nonlinear R ξ gauge for the
standard model with three and four generations and in models with two Higgs doublets. We
find that this decay could be relevant only in a scenario with two Higgs doublets and the
mass of the fourth-generation b′ quark larger than m t. Under these conditions, the flavor-
changing electromagnetic decays T q*→ D q γ (T q→ D q* γ) may surpass the standard
electromagnetic transition T q*→ T q γ.
standard model with three and four generations and in models with two Higgs doublets. We
find that this decay could be relevant only in a scenario with two Higgs doublets and the
mass of the fourth-generation b′ quark larger than m t. Under these conditions, the flavor-
changing electromagnetic decays T q*→ D q γ (T q→ D q* γ) may surpass the standard
electromagnetic transition T q*→ T q γ.
Abstract
We study the loop-induced flavor-changing decay t→ c+ γ in a nonlinear R ξ gauge for the standard model with three and four generations and in models with two Higgs doublets. We find that this decay could be relevant only in a scenario with two Higgs doublets and the mass of the fourth-generation b′ quark larger than m t. Under these conditions, the flavor-changing electromagnetic decays T q*→ D q γ (T q→ D q* γ) may surpass the standard electromagnetic transition T q*→ T q γ.
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