Searches for Resonant and Non-resonant HiggsBoson Pair-production in the bb?+?- Decay Channel with 36.1 fb-1 PP Collision Data at ?s = 13 TeV with the ATLAS Detector

[摘要] A search for resonant and non-resonant Higgs boson pair-production decaying to a bbττ final state is presented. The search uses 36.1 fb−1 of pp-collision data with √s = 13 T eV recorded by the ATLAS experiment at the LHC in 2015 and 2016. The semi-leptonic and fully hadronic di-tau final states are considered. No deviation from the Standard Model prediction is observed. Upper limits are placed on the resonant di-Higgs production cross-section times branching ratio for bbττ final states. The results are interpreted in terms of constraints on a Randall-Sundrum Kaluza-Klein graviton model, and a 2HDM model in an extended Higgs sector. The bbττ final state channel gives the best upper limit result among all ATLAS and CMS di-Higgs data analysis channels with it’s fantastic machine learning techniques and newly added channels,as well as,extra triggers. The cross-section times branching ratio for non-resonant Higgs pair-production is constrained to be ∼ 12.7 times of the Standard Model prediction, which is also the best sensitivity physicists have obtained among all experiment analysis channels.

[发布机构] University of Michigan

[效力级别] Standard Model

[关键词] Higgs Boson;Standard Model;Randal Sundrum Graviton;Two Doublet Higgs Model;ATLAS Detector;LHC;Physics;Science;Physics