Çetin, Serkant Ali2020-11-102020-11-102016-09-022470-00292470-0010https://hdl.handle.net/11411/2566https://doi.org/10.1103/PhysRevD.94.052002A search for Higgs-boson pair production in the bbbb final state is carried out with 3.2 fb(-1) of protonproton collision data collected at root s = 13 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 bbbb 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.eninfo:eu-repo/semantics/openAccessPLUS PLUSArticle2-s2.0-8499388199410.1103/PhysRevD.94.052002Q1WOS:000383050400002