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Lepton flavour violating top decays at the LHC (2015)

Springer

In: European Physical Journal C

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Publication Date: 2015-09-26

Description: We consider lepton-flavour violating decays of the top quark, mediated by 4-fermion operators. We compile constraints on a complete set of SU(3) \(\times \) 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 on \(\ell \) – \(\tau \) ; 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 fb \(^{-1}\) at 8 TeV) could be sensitive to \(BR(t \rightarrow e \bar{\mu }\) + jet) \( {\sim } 6\times 10^{-5}\) , and we extrapolate that 100 fb \(^{-1}\) at 13 TeV could reach a sensitivity of \({\sim } 1 \times 10^{-5}\) .

Print ISSN: 1434-6044

Electronic ISSN: 1434-6052

Topics: Physics

Published by Springer

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