Effects of an extra $Z^{\prime }$ gauge boson on the top quark decay $t-->c\gamma$

Abstract

The effects of an extra $Z^{\prime }$ gauge boson with family nonuniversal fermion couplings on the rare top quark decay $t-->c$gamma$arefirstexaminedinamodelindependentwayandthenintheminimal331model.Itisfoundthattherespectivebranchingfractionisatmostoftheorderof$10^{-8}$for$m_{Z'}=500$GeVanddramaticallydecreasesforaheavier$Z'$boson.Thisresultsisinsharpcontrastwithapreviousevaluationofthisdecayinthecontextoftopcolorassistedtechnicolormodels,whichfoundthat$B(t --> c γ)\sim 10^{-6}$for$m_{Z'}=1$ TeV.

New paragraphs included to clarify our results, conclusion remains unchanged

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Cited by in corpus (13)

• SUSY-induced FCNC top-quark processes at the Large Hadron Collider
• New Physics effects in the flavor-changing neutral couplings of the Top quark
• Closing the $SU(3{)}_L\otimes U(1{)}_X$ Symmetry at Electroweak Scale
• 3-3-1 Models at Electroweak Scale
• Higgs mediated flavor violating top quark decays t --> u_i H, u_i gamma, u_i gamma gamma, and the process gamma gamma --> t c in effective theories
• Calculable lepton masses, seesaw relations and four neutrino mixings in a 3-3-1 model with extra U(1) symmetry
• FCNC Top Quark Decays in Extra Dimensions
• Search for Top Quark FCNC Couplings in Z' Models at the LHC and CLIC
• Flavor changing neutral current decays $t\to cX$ ($X=\gamma ,g,Z,H$) and $t\to c\bar{\ell }\ell$ ($\ell =\mu ,\tau$) via scalar leptoquarks
• Decay $t->c\gamma$ in models with SU_L(3)XU_X(1) gauge symmetry
• Implications of $D^0-\overline{D^0}$ on the rare top quark decays $t\to u\gamma$ and $t\to ug$
• Rare decays of the top quark mediated by Z' gauge bosons and flavor violation
• Rare decay $t\to c\gamma \gamma$ via scalar leptoquark doublets