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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 = 13 TeV

ContributorsATLAS Collaboration
Collection
  • Open Access - SCOAP3
Publication date2018
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.

Citation (ISO format)
ATLAS Collaboration. Search for doubly charged Higgs boson production in multi-lepton final states with the ATLAS detector using proton–proton collisions at √s = 13 TeV. In: The European Physical Journal. C, Particles and Fields, 2018, vol. 78, n° 3, p. 199. doi: 10.1140/epjc/s10052-018-5661-z
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ISSN of the journal1434-6044
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