PoS - Proceedings of Science
Volume 314 - The European Physical Society Conference on High Energy Physics (EPS-HEP2017) - Higgs and New Physics (Poster Session). Scientific Secretary: Luciano Canton.
Search for doubly-charged Higgs boson in multi-lepton final states at $\sqrt{s}$=13 TeV with the ATLAS detector
G. Ucchielli*  on behalf of the ATLAS Collaboration
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Supplementary files:
Pre-published on: January 30, 2018
Published on: March 20, 2018
Abstract
A search for new high mass resonances decaying to two high-$p_\textrm{T}$ leptons with same-charge is presented. The results reported here use the $pp$ collision data sample corresponding to 36.1 fb$^{-1}$ of integrated luminosity collected in 2015 and 2016 by the ATLAS detector at the LHC with a centre-of-mass energy of 13 TeV. The benchmark model is doubly charged Higgs boson (DCH) production via Drell--Yan with subsequent exclusive decay into leptons.
Leptonic final states are very interesting since they provide a good sensitivity and small systematic uncertainties. In addition, requiring same-sign leptonic final states reduces the background contamination from Standard Model processes while providing a large sensitivity to Beyond Standard Model phenomena.
No significant evidence of a signal was observed and corresponding limits on the production cross-section and a lower limit on $m(H^{\pm\pm})$ were derived at 95% confidence level. The results at $\sqrt{s}$ = 13 TeV complement and improve former ones obtained by the ATLAS Collaboration with data at $\sqrt{s}$ = 8 TeV.
DOI: https://doi.org/10.22323/1.314.0722
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