Higgs mediated Double Flavor Violating top decays in Effective Theories

Abstract

The possibility of detecting double flavor violating top quark transitions at future colliders is explored in a model-independent manner using the effective Lagrangian approach through the $t\to u_i\tau \mu$ ($u_i=u,c$) decays. A Yukawa sector that contemplates $S{U}_L(2)\times U_Y(1)$ invariants of up to dimension six is proposed and used to derive the most general flavor violating and CP violating $q_i{q}_{j}H$ and $l_i{l}_{j}H$ vertices of renormalizable type. Low-energy data, on high precision measurements, and experimental limits are used to constraint the $t{u}_{i}H$ and $H\tau \mu$ vertices and then used to predict the branching ratios for the $t\to u_i\tau \mu$ decays. It is found that this branching ratios may be of the order of $10^{-4}-10^{-5}$, for a relative light Higgs boson with mass lower than $2m_W$, which could be more important than those typical values found in theories beyond the standard model for the rare top quark decays $t\to u_i{V}_i{V}_j$ ($V_i=W,Z,\gamma ,g$) or $t\to u_i{l}^{+}{l}^{-}$. %% LHC experiments, by using a total integrated luminosity of $3000f{\mathrm{b}}^{-1}$ of data, will be able to rule out, at 95% C.L., DFV top quark decays up to a Higgs mass of 155 GeV/$c^2$ or discover such a process up to a Higgs mass of 147 GeV/$c^2$.

24 pages, 11 figures

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Cited by in corpus (11)

• Probing the Anomalous FCNC Interactions in Top-Higgs Final State and Charge Ratio Approach
• Lepton Flavour Violating top decays at the LHC
• Constraints on flavor-changing neutral-current $Htq$ couplings from the signal of $tH$ associated production with QCD next-to-leading order accuracy at the LHC
• Flavor violating signatures of lighter and heavier Higgs bosons within the Two Higgs Doublet Model Type-III at the LHeC
• Lepton flavor violating Higgs boson decay $h\to \mu \tau$ at the ILC
• Flavor violation in chromo- and electromagnetic dipole moments induced by $Z^{\prime }$ gauge bosons and a brief revisit of the Standard Model
• Limits on the anomalous $Wtq$ couplings
• Implications of Lorentz violation on Higgs-mediated lepton flavor violation
• Flavour-changing neutral scalar interactions of the top quark
• Bounding the B_s -> gamma gamma decay from Higgs mediated FCNC transitions
• Novel and Updated Bounds on Flavor-Violating Z Interactions in the Quark Sector