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

We study the discovery potential of down type iso-singlet quarks, D, predicted by the E6 GUT model in the pp -> D (D) over bar -> ZZd (d) over bar -> l(+)l(-)l(+)l(-) d (d) over bar 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 730 GeV whereas FCC-hh up to 2980 GeV with data collected in their complete run periods.

Automated summary

The study shows that the HL-LHC and FCC-hh colliders have the potential to discover the predicted down type iso-singlet quarks, D, using a specific channel, with HL-LHC capable of detecting D quarks up to a mass of 730 GeV and FCC-hh up to 2980 GeV.