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

Aaboud, M ; Aad, G ; Abbott, B. ; Abdinov, O ; Abeloos, B ; Abidi, S. H. ; Åkesson, Torsten LU orcid ; Bocchetta, Simona LU ; Doglioni, Caterina LU and Hedberg, Vincent LU , et al. (2018) In European Physical Journal C 78(3).
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... (More)
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. © 2018, CERN for the benefit of the ATLAS collaboration. (Less)
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publishing date
type
Contribution to journal
publication status
published
subject
in
European Physical Journal C
volume
78
issue
3
article number
2018:199
publisher
Springer
external identifiers
  • scopus:85043693583
ISSN
1434-6044
DOI
10.1140/epjc/s10052-018-5661-z
language
English
LU publication?
yes
additional info
Export Date: 27 March 2018
id
6611e192-39c2-4836-8b66-2161f6bbdf1f
alternative location
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85043693583&doi=10.1140%2fepjc%2fs10052-018-5661-z&partnerID=40&md5=a5e16e3655292a4a4676da51ff7ea337
date added to LUP
2018-03-27 15:10:11
date last changed
2023-04-08 09:42:50
@article{6611e192-39c2-4836-8b66-2161f6bbdf1f,
  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. © 2018, CERN for the benefit of the ATLAS collaboration.}},
  author       = {{Aaboud, M and Aad, G and Abbott, B. and Abdinov, O and Abeloos, B and Abidi, S. H. and Åkesson, Torsten and Bocchetta, Simona and Doglioni, Caterina and Hedberg, Vincent and Jarlskog, Göran and Kalderon, Charles and Kellermann, Edgar and Konya, Balazs and Lytken, Else and Mankinen, Katja and Mjörnmark, Ulf and Pöttgen, Ruth and Poulsen, Trine and Smirnova, Oxana and Viazlo, Oleksandr}},
  issn         = {{1434-6044}},
  language     = {{eng}},
  number       = {{3}},
  publisher    = {{Springer}},
  series       = {{European Physical Journal C}},
  title        = {{Search for doubly charged Higgs boson production in multi-lepton final states with the ATLAS detector using proton–proton collisions at √s=13TeV}},
  url          = {{http://dx.doi.org/10.1140/epjc/s10052-018-5661-z}},
  doi          = {{10.1140/epjc/s10052-018-5661-z}},
  volume       = {{78}},
  year         = {{2018}},
}