Searches for the associated $t\bar{t}H$ production at CMS

TL;DR

This paper reviews CMS searches for the associated production of the Higgs boson with top quarks ($t\bar{t}H$), analyzing multiple decay channels and introducing a new matrix element method to improve detection sensitivity.

Contribution

It provides a comprehensive overview of CMS $t\bar{t}H$ search results using full 7 and 8 TeV datasets and introduces a novel matrix element analysis technique.

Findings

Multiple decay modes studied including b-quarks, photons, and tau leptons

First application of matrix element method in $t\bar{t}H$ searches

Enhanced sensitivity to $t\bar{t}H$ signal detection

Abstract

After the recent discovery of the Higgs boson, the next important goal is to measure its properties. Probing the Yukawa coupling of the Higgs boson to top quarks is a particularly important test of physics beyond the standard model. This coupling can be experimentally accessed by measuring the cross section of the Higgs boson production in association with a top quark pair ($t\bar{t}H$). The talk gives an overview of CMS results on $t\bar{t}H$ searches, using the full dataset of pp-collision data collected at the centre of mass energies of 7 and 8 TeV. All relevant Higgs boson decay modes have been studied, including Higgs decays to b-quarks, photons, $\tau$-leptons and multi-lepton final states. Additionally, the first Matrix Element Method based analysis has been carried out, that aims to further increase the sensitivity to the signal.