The search for standard model four-top-quark production at sqrt(s) = 13 TeV in the single lepton and opposite-sign dilepton channels

TL;DR

This paper reports a search for four-top-quark production at 13 TeV using CMS data, employing machine learning techniques to distinguish signal from background, and sets an upper limit on the production cross section.

Contribution

It introduces a combined analysis of single lepton and dilepton channels with a boosted decision tree for improved signal selection at 13 TeV.

Findings

Upper limit on four-top-quark production cross section set

Utilized 2.6 fb-1 of CMS data from 2015

Applied machine learning for background suppression

Abstract

A combined search for standard model four-top-quark production in the single lepton plus jets and dilepton channels will be presented. The analysis utilises the 2015 dataset recorded by the CMS experiment at sqrt(s) = 13 TeV which corresponds to an integrated luminosity of 2.6 fb-1. A scheme based on a boosted decision tree algorithm is used to select signal and suppress backgrounds. An upper limit on the cross section of four-top-quark production will be presented.