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Lepton flavour violating top decays at the LHC

Abstract : We consider lepton flavour violating decays of the top quark, mediated by four-fermion operators. We compile constraints on a complete set of SU(3)*U(1)-invariant operators, arising from their loop contributions to rare decays and from HERA's single top search. The bounds on e-mu flavour change are more restrictive than l-tau; nonetheless the top could decay to a jet $+ e \bar{\mu}$ with a branching ratio of order $10^{-3}$. We estimate that the currently available LHC data (20 inverse-fb at 8 TeV) could be sensitive to $BR(t \to e \bar{\mu}$+ jet) $ \sim 6\times 10^{-5}$, and extrapolate that 100 inverse-fb at 13 TeV could reach a sensitivity of $ \sim 1 \times 10^{-5}$.
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Contributor : Sylvie Flores Connect in order to contact the contributor
Submitted on : Tuesday, July 28, 2015 - 7:08:04 AM
Last modification on : Friday, September 10, 2021 - 1:50:14 PM

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Sacha Davidson, M.L. Mangano, S. Perries, V. Sordini. Lepton flavour violating top decays at the LHC. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2015, 75 (9), pp.450. ⟨10.1140/epjc/s10052-015-3649-5⟩. ⟨in2p3-01180713⟩



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