Search for doubly charged Higgs boson production in multi-lepton final states with the ATLAS detector using proton-proton collisions at √<i>s</i>=13TeV



Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H, Abreu, H
et al (show 2897 more authors) (2018) Search for doubly charged Higgs boson production in multi-lepton final states with the ATLAS detector using proton-proton collisions at √<i>s</i>=13TeV. EUROPEAN PHYSICAL JOURNAL C, 78 (3). 199-.

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Abstract

A search for doubly charged Higgs bosons with pairs of prompt, isolated, highly energetic leptons with the same electric charge is presented. The search uses a proton-proton collision data sample at a centre-of-mass energy of 13 TeV corresponding to 36.1 fb - 1 of integrated luminosity recorded in 2015 and 2016 by the ATLAS detector at the LHC. This analysis focuses on the decays H ± ± → e ± e ± , H ± ± → e ± μ ± and H ± ± → μ ± μ ± , fitting the dilepton mass spectra in several exclusive signal regions. No significant evidence of a signal is observed and corresponding limits on the production cross-section and consequently a lower limit on m ( H ± ± ) are derived at 95% confidence level. With ℓ ± ℓ ± = e ± e ± / μ ± μ ± / e ± μ ± , the observed lower limit on the mass of a doubly charged Higgs boson only coupling to left-handed leptons varies from 770 to 870 GeV (850 GeV expected) for B ( H ± ± → ℓ ± ℓ ± ) = 100 % and both the expected and observed mass limits are above 450 GeV for B ( H ± ± → ℓ ± ℓ ± ) = 10 % and any combination of partial branching ratios.

Item Type: Article
Additional Information: 52 pages in total, author list starting page 35, 14 figures, 7 tables, published in EPJC, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2016-07/
Uncontrolled Keywords: ATLAS Collaboration
Depositing User: Symplectic Admin
Date Deposited: 26 Mar 2018 06:25
Last Modified: 25 Jan 2024 09:03
DOI: 10.1140/epjc/s10052-018-5661-z
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3019455