학술논문
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 root s=13 TeV with the ATLAS detector
Document Type
Author
Bertoli, Gabriele; Bessidskaia Bylund, Olga; Bohm, Christian; Carney, Rebecca M. D.; Clément, Christophe; Gellerstedt, Karl; Hellman, Sten; Jon-And, Kerstin; Milstead, David A.; Moa, Torbjörn; Molander, Simon; Pasuwan, Patrawan; Shaikh, Nabila W.; Silverstein, Samuel B.; Sjölin, Jörgen; Strandberg, Sara; Ughetto, Michaël; Valdes Santurio, Eduardo; Wallängen, Veronica
Source
Physics Letters B. 783:392-414
Subject
Language
English
ISSN
0370-2693
1873-2445
1873-2445
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 root 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 230-800 GeV of the A boson. The results are interpreted in the context of two-Higgs-doublet models.