Decayt→cγin models withSUL(3)×UX

I Cortés-Maldonado

¹

,

G. Hernández-Tomé

²

,

G. Tavares‐Velasco

³

Abstract

Decay t → cγ in models with SU L (3) × U X (1) gauge symmetry

Excluding the light dark matter window of a 331 model using LHC and direct dark matter detection data

“…It is important to stress that such constraints on the Z mass do apply, at some level, to all 331 models, that have fermions as DM candidates, as discussed in Fig.7 of Ref. [32], and are complementary to others coming from colliders [34,35], FCNC [36], muon decay [37], top decay [38] analyses, and oblique STU parameters [39,40].…”

Flavor changing neutral current decays $$t\rightarrow c X$$ ($$X=\gamma ,\,g,\, Z,\, H$$) and $$t\rightarrow c{{\bar{\ell }}}\ell $$ ($$\ell =\mu ,\,\tau $$) via scalar leptoquarks

“…These rates however can be several orders of magnitude larger in several SM extensions, such as two-Higgs doublet models [25,28], supersymmetric models [29][30][31][32], left-right supersymmetric models [33], extra dimensions [34], models with an extra neutral gauge boson [35], 331 models [36], etc. Therefore, any experimental evidence of these FCNCs top quark and Higgs boson decay channels may shed light on the underlying fundamental theory of particle interactions.…”

Flavor changing neutral current decays $t\to c X$ ($X=γ,\,g,\, Z,\, H$) and $t\to c\bar \ell\ell $ ($\ell=μ,\,τ$) via scalar leptoquarks

“…These rates however can be several orders of magnitude larger in several SM extensions, such as two-Higgs doublet models [25,28], supersymmetric models [29][30][31][32], left-right supersymmetric models [33], extra dimensions [34], models with an extra neutral gauge boson [35], 331 models [36], etc. Therefore, any experimental evidence of these FCNCs top quark and Higgs boson decay channels may shed light on the underlying fundamental theory of particle interactions.…”