Down type iso-singlet quarks at the HL-LHC and FCC-hh

Abstract

We study the discovery potential of down type iso-singlet quarks, $D$, predicted by the $E_6$ GUT model in the $pp\to D\bar{D}\to ZZd\bar{d}\to {\ell }^{+}{\ell }^{-}{\ell }^{+}{\ell }^{-}d\bar{d}$ channel at the HL-LHC and FCC-hh colliders. The analysis is performed using a high level analysis description language and its runtime interpreter. The study shows that, using solely this channel, HL-LHC can discover $D$ quarks up to a mass of 710 GeV whereas FCC-hh up to 2430 GeV with data collected in their complete run periods.

Comments: 13 pages, 10 figures