Model Independent Predictions for Rare Top Decays with Weak Coupling

Abstract

Measurements at B factories have provided important constraints on new physics in several rare processes involving the B meson. New Physics, if present in the b quark sector may also affect the top sector. In an effective Lagrangian approach, we write down operators where effects in the bottom and the top sector are related. Assuming the couplings of the operators to be of the same size as the weak coupling g of the Standard Model and taking into account constraints on new physics from the bottom sector as well as top branching ratios, we make predictions for the rare top decays t -> cV where V = γ, Z. We find branching fractions for these decays within possible reach of the LHC. Predictions are also made for t -> sW.

14 pages, 4 figures. Accepted in PRD

References in corpus (13)

• Estimate of BR(B -> X_s gamma) at O(alpha_s^2)
• Deciphering top flavor violation at the LHC with B factories
• Next-to-leading order QCD corrections to the top quark decay via model-independent FCNC couplings
• The "Top Priority" at the LHC
• Study of ATLAS sensitivity to FCNC top decays
• t->cg, cγ, cZ in the Left-Right Supersymmetric Model
• Flavor-Changing Top Quark Rare Decays in the Littlest Higgs Model with T-Parity
• The 2-3 symmetry: Flavour Changing $b$, $\tau$ Decays and Neutrino Mixing
• The size of chi = arg (-Vts Vtb* Vcs* Vcb) and physics beyond the Standard Model
• Ansatz for small FCNC with a non-universal $Z^{\prime }$
• Suppressed FCNC in New Physics with Shared Flavor Symmetry
• $B_s^0-{\bar{B}}_s^0$ mixing and $b\to s$ transitions in isosinglet down quark model
• Unparticle effects on top quark rare decays

Cited by in corpus (9)

• The Azimuthal $B\to D^{\ast }{\tau }^{-}\overline{{\nu }_{\tau }}$ Angular Distribution with Tensor Operators
• The Top Forward Backward Asymmetry with general Z ' couplings
• Rare Top Decays in Minimal and Non-minimal Universal Extra Dimension
• QCD Corrections to Flavor Changing Neutral Coupling Mediated Rare Top Quark Decays
• $t\to cg$ and $t\to cZ$ in Universal Extra Dimensional Models
• Using t -> b \bar{b} c to Search for New Physics
• Single top or bottom production associated with a scalar in γp collision as a probe of topcolor-assisted technicolor
• Top Rare Decays t-> cV in the Mirror Twin Higgs Models
• Studying flavor-changing neutral tqZ couplings: Current constraints and future prospects