A search for Higgs-boson pair production in the $b\overline{b}b\overline{b}$ final state is carried out with $3.2{\mathrm{fb}}^{-1}$ of proton-proton collision data collected at $\sqrt{s}=13\mathrm{TeV}$ with the ATLAS detector. The data are consistent with the estimated background and are used to set upper limits on the production cross section of Higgs-boson pairs times branching ratio to $b\overline{b}b\overline{b}$ for both nonresonant and resonant production. In the case of resonant production of Kaluza-Klein gravitons within the Randall-Sundrum model, upper limits in the 24 to 91 fb range are obtained for masses between 600 and 3000 GeV, at the 95% confidence level. The production cross section times branching ratio for nonresonant Higgs-boson pairs is also constrained to be less than 1.22 pb, at the 95% confidence level.

• Received 16 June 2016

DOI:https://doi.org/10.1103/PhysRevD.94.052002

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© 2016 CERN, for the ATLAS Collaboration