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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 vs =13 TeV with the ATLAS detector

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journal contribution
posted on 2023-06-09, 15:51 authored by The ATLAS Collaboration, N L Abraham, Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C A Chavez Barajas, Antonella De SantoAntonella De Santo, Samuel Jones, G Lerner, F Miano, Fabrizio SalvatoreFabrizio Salvatore, I Santoyo Castillo, Kate ShawKate Shaw, C Y Shehu, Thomas StevensonThomas Stevenson, K Suruliz, Mark SuttonMark Sutton, Fabio Tresoldi, Fabrizio Trovato, Iacopo Vivarelli, E Winkles, O J Winston, others
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 vs =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.

History

Publication status

  • Published

File Version

  • Published version

Journal

Physics Letters B

ISSN

0370-2693

Publisher

Elsevier

Volume

783

Page range

392-414

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Experimental Particle Physics Research Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2018-11-12

First Open Access (FOA) Date

2018-11-12

First Compliant Deposit (FCD) Date

2018-11-09

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