Search for Resonant and Nonresonant Higgs Boson Pair Production in the bb[over ¯]τ^{+}τ^{-} Decay Channel in pp Collisions at √s=13  TeV with the ATLAS Detector



ATLAS Collaboration, , Aaboud, Morad, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL
et al (show 2 more authors) (2018) Search for Resonant and Nonresonant Higgs Boson Pair Production in the bb[over ¯]τ^{+}τ^{-} Decay Channel in pp Collisions at √s=13  TeV with the ATLAS Detector. Physical Review Letters, 121 (19).

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Abstract

A search for resonant and nonresonant pair production of Higgs bosons in the bb[over ¯]τ^{+}τ^{-} final state is presented. The search uses 36.1  fb^{-1} of pp collision data with √s=13  TeV recorded by the ATLAS experiment at the LHC in 2015 and 2016. Decays of the τ-lepton pairs with at least one τ lepton decaying to final states with hadrons and a neutrino are considered. No significant excess above the expected background is observed in the data. The cross-section times branching ratio for nonresonant Higgs boson pair production is constrained to be less than 30.9 fb, 12.7 times the standard model expectation, at 95% confidence level. The data are also analyzed to probe resonant Higgs boson pair production, constraining a model with an extended Higgs sector based on two doublets and a Randall-Sundrum bulk graviton model. Upper limits are placed on the resonant Higgs boson pair production cross-section times branching ratio, excluding resonances X in the mass range 305  GeV<m_{X}<402  GeV in the simplified hMSSM minimal supersymmetric model for tanβ=2 and excluding bulk Randall-Sundrum gravitons GKK in the mass range 325  GeV<m_{G_{KK}}<885   GeV for k/M[over ¯]_{Pl}=1.

Item Type: Article
Additional Information: collaboration: ATLAS archiveprefix: arXiv primaryclass: hep-ex reportnumber: CERN-EP-2018-164 slaccitation: %%CITATION = ARXIV:1808.00336;%% Erratum Phys. Rev. Lett. 122, 089901 (2019) (https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.089901)
Depositing User: Symplectic Admin
Date Deposited: 19 Sep 2018 09:27
Last Modified: 26 Nov 2020 11:10
DOI: 10.1103/PhysRevLett.121.191801
Open Access URL: https://doi.org/10.1103/PhysRevLett.121.191801
Related URLs:
URI: http://livrepository.liverpool.ac.uk/id/eprint/3026485