ATLAS collaboration (2865 authors)Aguilar-Saavedra, Juan AntonioAmor Dos Santos, Susana PatriciaAnjos, NunoAraque, Juan PedroCantrill, RobertCarvalho, JoãoCastro, Nuno FilipeConde Muiño, PatriciaDa Cunha Sargedas De Sousa, Mario JoseFiolhais, MiguelGalhardo, BrunoGomes, AgostinhoGonçalo, RicardoJorge, PedroLopes, LourencoMachado Miguens, JoanaMaio, AméliaManeira, JoséOnofre, AntónioPalma, AlbertoPedro, RutePina, João AntonioSantos, HelenaSaraiva, JoãoSilva, JoséTavares Delgado, AdemarVeloso, FilipeWolters, Helmut2019-02-042019-02-042016-01-05http://dx.doi.org/10.1140/epjc/s10052-015-3823-9http://hdl.handle.net/10400.26/26907Searches for pair-produced scalar leptoquarks are performed using 20 fb$^{-1}$ of proton–proton collision data provided by the LHC and recorded by the ATLAS detector at $\sqrt{s}=8$  TeV. Events with two electrons (muons) and two or more jets in the final state are used to search for first (second)-generation leptoquarks. The results from two previously published ATLAS analyses are interpreted in terms of third-generation leptoquarks decaying to $b\nu _{\tau }\bar{b}\bar{\nu _{\tau }}$ and $t\nu _{\tau }\bar{t}\bar{\nu _{\tau }}$ final states. No statistically significant excess above the Standard Model expectation is observed in any channel and scalar leptoquarks are excluded at 95 % CL with masses up to $m_{\mathrm {LQ1}}<$  1050 GeV for first-generation leptoquarks, $m_{\mathrm {LQ2}}<$  1000 GeV for second-generation leptoquarks, $m_{\mathrm {LQ3}}<$  625 GeV for third-generation leptoquarks in the $b\nu _{\tau }\bar{b}\bar{\nu _{\tau }}$  channel, and 200  $< m_{\mathrm {LQ3}}< $  640 GeV in the $t\nu _{\tau }\bar{t}\bar{\nu _{\tau }}$  channel.engjournal article2019-02-04