Triple top quark production in Standard Model

TL;DR

This paper calculates the cross sections for triple top quark production in the Standard Model at 14 and 100 TeV, highlighting the significance of electroweak contributions and interference effects, and assesses the detectability at the HL-LHC.

Contribution

It provides the first detailed calculations of triple top production cross sections including electroweak effects and interference, with implications for future collider experiments.

Findings

Cross sections are about 1.9 fb at 14 TeV and 530 fb at 100 TeV.

Electroweak contributions are significant and interfere destructively with gluon-mediated processes.

Approximately 5700 events are expected at HL-LHC with 3 ab$^{-1}$ luminosity.

Abstract

The triple top quark production processes have been investigated and calculated in the scope of the Standard Model. The cross sections for different channels are provided for the proton-proton collision energies of $\sqrt{s}=$ 14 and 100 TeV. The importance of the electroweak contribution has been demonstrated. For the main channels the interference between the gluon and the weak bosons mediated contributions is negative and significant, therefore the complete set of diagrams has to be taken into account. Estimated total rates are about 1.9 fb for $\sqrt{s}=14$ TeV and 530 fb for $\sqrt{s}=100$ TeV. A simple estimation of the uncertainty of the calculated cross sections gives about 20\%. The integrated luminosity of 3 ab$^{-1}$ at HL-LHC allows expecting about 5700 events, giving a chance to detect this rare process.