Search for non-resonant di-Higgs production in the $b\bar{b}b\bar{b}$ final state at 13 TeV with the ATLAS experiment

Shota Hayashida
2022 Proceedings of 41st International Conference on High Energy physics — PoS(ICHEP2022)   unpublished
Results are presented of the search for non-resonant di-Higgs production in the 𝑏 b𝑏 b final state using the Run-2 dataset of proton-proton collisions at √ 𝑠 = 13 TeV accumulated with the ATLAS detector. The 𝑏 b𝑏 b final state is one of the most sensitive channels for measuring the Higgs self-coupling and the di-Higgs production cross-section, thanks to its high branching ratio. The analysis utilizes a novel neural network to estimate the large QCD multijet backgrounds, and employs analysis
more » ... gorizations to improve the sensitivity to di-Higgs production. The analysis strategy and the latest result of the observed (expected) upper limits on the SM di-Higgs production cross-section and the constraint on the Higgs self-coupling in this analysis are presented.
doi:10.22323/1.414.0991 fatcat:vu5fnfgsfbf2hnqkvvq7ym57oq