Study of Higgs Boson Production in the ttHH mode at the Future HL-LHC with the ATLAS Detector at CERN

The Higgs field is one of the fundamental constituents of the Standard Model of Particle Physics. It plays a crucial role in giving mass to fundamental particles and is directly related to the electroweak symmetry breaking. Much effort has gone into studying Higgs pair production through two different production modes, gluon-gluon fusion and vector-boson fusion. However, a third production mode, top quark-antiquark production (ttHH) can serve as a valuable source of information for probing the limits of the Standard Model pertaining to the Higgs boson. With the much lower cross-section of ttHH production, higher luminosities and better statistics are required to detect ttHH production. The HL-LHC should provide both the upgraded detector technology and the higher luminosities required. Using Monte Carlo simulations, we generate ttHH samples, along with background samples, to simulate their detector response for future accelerator technologies.