Study of the Top-quark Pair Production in Association with a Bottom-quark Pair from Fast Simulations at the LHC

TL;DR

This study uses fast simulations to analyze top-quark pair production with bottom-quark pairs at the LHC, providing insights into rare processes and aiding searches for new physics and the Higgs-top coupling.

Contribution

It presents the first detailed simulation-based analysis of ttbb production at the LHC, comparing it with related processes and assessing its significance for early Run II data.

Findings

Differential distributions of ttbb are characterized and compared.

Significance of ttbb process is evaluated for 10 fb-1 data.

Results support future searches for new physics and Higgs interactions.

Abstract

A large number of top quarks will be produced at the Large Hadron Collider (LHC) for Run II period. This will allow us to measure the rare processes from the top sector in great details. We present the study of the top-quark pair production in association with a bottom-quark pair (ttbb) from fast simulations for the Compact Muon Solenoid (CMS) experiment. The differential distributions of ttbb are compared with the top-quark pair production with two additional jets (ttjj) and with the production in association with the Higgs (ttH), where the Higgs decays to a bottom-quark pair. The significances of ttbb process in the dileptonic and semileptonic decay mode are calculated with the data corresponding to an integrated luminosity of 10 fb-1, which is foreseen to be collected in the early Run II period. This study will be an important input in searching for new physics beyond the standard model as well as in searching for ttH process where the Yukawa coupling with the top quark can be directly measured.