The decay $b\to s\gamma$ in the 3-3-1 model

Abstract

The 3-3-1 model, based on the gauge group $SU(3{)}_c\times SU(3{)}_L\times U(1{)}_X$, makes a natural prediction of three generations based on anomaly cancellation. Since this is accomplished by incorporating the third family of quarks differently from the other two, it leads to potentially large flavor changing neutral currents. A sensitive place to look for such effects is the flavor changing $b\to s\gamma$ decay, which has recently been measured at CLEO. We compute this decay rate in the 3-3-1 model and compare it with that of the two-Higgs-doublet model, a subset of the full 3-3-1 model. We find that the additional 3-3-1 physics weakens the bound on the charged Higgs mass from $M_{H^{+}}>290$~GeV to $M_{H^+}\agt120$~GeV.

20 pp. + 6 postscript figures (included at end)

Cited by in corpus (16)

• 331 models facing new b -> s mu^+ mu^- data
• Towards the Identification of New Physics through Quark Flavour Violating Processes
• The Anatomy of Quark Flavour Observables in 331 Models in the Flavour Precision Era
• Z-Z' Mixing and Z-Mediated FCNCs in SU(3)_C x SU(3)_L x U(1)_X Models
• Flavor Changing Neutral Current Effects and CP Violation in the Minimal 3-3-1 Model
• FCNC and Rare B Decays in 3-3-1 Models
• Two-body $Z^{\prime }$ decays in the minimal 331 model
• 3-3-1 Models with Unique Lepton Generations
• FCNC in the minimal 3-3-1 model revisited
• Lepton number violation in 331 models
• Nonperturbative corrections to moments of the decay B -> X_s l^+ l^-
• 3-3-1 exotic quark search at CERN LEPII-LHC
• Bounding the Minimal 331 Model through the Decay B -> X_s gamma
• The decay $b\to s\gamma$ in the presence of a constant antisymmetric tensor field
• Bounding the B_s -> gamma gamma decay from Higgs mediated FCNC transitions
• Decay $t->c\gamma$ in models with SU_L(3)XU_X(1) gauge symmetry