Prospects for Higgs boson and new scalar resonant production searches in ttbb final state at the LHC

TL;DR

This paper investigates the potential to detect a new heavy scalar resonance produced alongside the Higgs boson in proton-proton collisions at 13 TeV, focusing on the ttbb final state using advanced analysis techniques.

Contribution

It introduces a novel search strategy employing Deep Neural Networks for better event reconstruction and sensitivity estimation for new scalar resonances at the LHC.

Findings

Projected 95% upper limits on production cross section and branching ratios.

Demonstrated effectiveness of machine learning in resolving jet ambiguities.

Provided analysis framework for future experimental searches.

Abstract

In this article we probe resonant associated production of a Standard Model Higgs boson with new heavy scalar resonant in proton-proton collisions at a center-of-mass energy $\sqrt{s} = 13$ TeV. The Higgs boson and new scalar resonant are required to decay into a pair of bottom quarks and a pair of top quarks, respectively. Semileptonic decay of top quarks is considered. The searches are projected into operation conditions of the Large Hadron Collider during Run II data taking period at a center-of-mass energy of 13 TeV using Monte Carlo generated events, realistic detector response simulation and available Open Data samples. Analysis strategies are summarized and machine learning approach using Deep Neural Network is proposed to resolve ambiguous in jets assignment and improve kinematic reconstruction of signal events. Sensitivity of the CMS detector is estimated as 95% expected upper limits on the product of the production cross section and the branching fractions of the searched process.