ATLAS collaboration (2898 authors)Aguilar-Saavedra, Juan AntonioAmor Dos Santos, Susana PatriciaAnjos, NunoAraque, Juan PedroCantrill, RobertCarvalho, JoãoCastro, Nuno FilipeConde Muiño, PatriciaDa Cunha Sargedas De Sousa, Mario JoseDo Valle Wemans, AndréFiolhais, MiguelGalhardo, BrunoGomes, AgostinhoGonçalo, RicardoJorge, PedroLopes, LourencoMachado Miguens, JoanaMaio, AméliaManeira, JoséMarques, CarlosOnofre, AntónioPalma, AlbertoPedro, RutePina, João AntonioPinto, BelmiroSantos, HelenaSaraiva, JoãoSilva, JoséTavares Delgado, AdemarVeloso, FilipeWolters, Helmut2019-02-042019-02-042015-02-10http://dx.doi.org/10.1140/epjc/s10052-015-3261-8http://hdl.handle.net/10400.26/26693This paper reports on a search for narrow resonances in diboson production in the $\mathrm {\ell \ell }q\bar{q}$ final state using $pp$ collision data corresponding to an integrated luminosity of $20$  fb$^{-1}$ collected at $\sqrt{s}=8$  TeV with the ATLAS detector at the Large Hadron Collider. No significant excess of data events over the Standard Model expectation is observed. Upper limits at the 95 % confidence level are set on the production cross section times branching ratio for Kaluza–Klein gravitons predicted by the Randall–Sundrum model and for Extended Gauge Model $W^\prime $ bosons. These results lead to the exclusion of mass values below 740 and 1590 GeV for the graviton and $W^\prime $ boson respectively.engjournal article2019-02-04