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arXiv · 1704.07343

Impact of Rare Decays $t \to \ell' \nu b \ell\ell$ and $t \to q q' b \ell\ell$ on Searches for Top-Associated Physics

Peter Onyisi·Aaron Webb
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Abstract

Searches for top quark-associated physics such as $t\bar t W$ or $t\bar t H$ in final states with multiple leptons require a careful accounting of expected backgrounds due to the lack of reconstructible resonances. We demonstrate that the rare top quark decays $t \to \ell' \nu b \ell\ell$ and $t \to q q' b \ell\ell$, when a soft lepton is not detected, can contribute a non-negligible background to such searches. Simulations in the LHC experiments typically do not account for such decays and as such backgrounds to such searches may be underestimated.

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Peter Onyisi, Aaron Webb. 2017-04-24. Impact of Rare Decays $t \to \ell' \nu b \ell\ell$ and $t \to q q' b \ell\ell$ on Searches for Top-Associated Physics. https://doi.org/10.1007/jhep02(2018)156

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