Search for a heavy Higgs boson decaying into a boson and another heavy Higgs boson in the Final State in Collisions at TeV with the ATLAS detector
M. Aaboud (Faculté des Sciences, Université Mohamed Premier, LPTPM, Oujda, Morocco); G. Aad (CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France); B. Abbott (Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, United States of America); O. Abdinov (Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan); B. Abeloos (LAL, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, France); et al - Show all 2902 authors
A search for a heavy neutral Higgs boson, A, decaying into a Z boson and another heavy Higgs boson, H, is performed using a data sample corresponding to an integrated luminosity of 36.1 fb$^{−1}$ from proton–proton collisions at TeV recorded in 2015 and 2016 by the ATLAS detector at the Large Hadron Collider. The search considers the Z boson decaying to electrons or muons and the H boson into a pair of b-quarks. No evidence for the production of an A boson is found. Considering each production process separately, the 95% confidence-level upper limits on the production cross-section times the branching ratio are in the range of 14–830 fb for the gluon–gluon fusion process and 26–570 fb for the b-associated process for the mass ranges 130–700 GeV of the H boson and 230–800 GeV of the A boson. The results are interpreted in the context of two-Higgs-doublet models.
