Rare top quark decays at a 100 TeV proton-proton collider: $t \rightarrow bWZ$ and $t\rightarrow hc$

Andreas Papaefstathiou; Gilberto Tetlalmatzi-Xolocotzi

doi:10.1140/epjc/s10052-018-5701-8

paper

Rare top quark decays at a 100 TeV proton-proton collider: $t \to bW Z$ and $t \to h c$

arXiv:1712.06332 · doi:10.1140/epjc/s10052-018-5701-8

Abstract

We investigate extremely rare top quark decays at a future proton-proton collider with centre-of-mass energy of 100 TeV. We focus on two decay modes: radiative decay with a $Z$ boson, $t \to bW Z$ , and flavour-changing neutral decay with a Higgs boson, $t \to h c$ , the former being kinematically suppressed with a branching ratio of $O (1 0^{- 6})$ , and the latter highly loop-suppresed, with a branching ratio of $O (1 0^{- 15})$ . We find that $t \to bW Z$ will be very challenging to observe in top quark pair production, even within well-motivated beyond-the-Standard Model scenarios. For the mode $t \to h c$ we find a stronger sensitivity than that obtained by any future LHC measurement by at least one order of magnitude.

arXiv commentMatches published version, two column, 8 pages, 4 figures

Rare top quark decays at a 100 TeV proton-proton collider: $t \to bW Z$ and $t \to h c$

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Rare top quark decays at a 100 TeV proton-proton collider: t→bWZ and t→hc

Abstract

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Rare top quark decays at a 100 TeV proton-proton collider: $t \to bW Z$ and $t \to h c$