The ATLAS Collaboration, , Abraham, N L, Allbrooke, B M M, Asquith, L, Cerri, A, Chavez Barajas, C A, De Santo, A, Jones, S D, Lerner, G, Miano, F, Salvatore, F, Santoyo Castillo, I, Shaw, K, Shehu, C Y, Stevenson, T, Suruliz, K, Sutton, M, Tresoldi, F, Trovato, F, Vivarelli, I, Winkles, E, Winston, O J and others, (2018) Search for a heavy Higgs boson decaying into a Z boson and another heavy Higgs boson in the ℓℓbb final state in pp collisions at √s =13 TeV with the ATLAS detector. Physics Letters B, 783. pp. 392-414. ISSN 0370-2693

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Abstract

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 √s =13 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 pp→A→ZH production cross-section times the branching ratio H→bb 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 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 the two-Higgs-doublet model.

Item Type:	Article
Schools and Departments:	School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups:	Experimental Particle Physics Research Group
Subjects:	Q Science > QC Physics
Depositing User:	Alice Jackson
Date Deposited:	12 Nov 2018 14:55
Last Modified:	12 Nov 2018 15:03
URI:	http://sro.sussex.ac.uk/id/eprint/80145

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