Chan, StephenClark, Brian LeeFranklin, MelissaGiromini, PaoloHuth, JohnIppolito, ValerioLazovich, TomoLopez Mateos, DavidMorii, MasahiroRogan, Christopher S.Roloff, JenniferSun, SiyuanTolley, EmmaTong, BaojiaTuna, AlexanderZambito, Stefano2017-06-202017ATLAS Collaboration. 2017. “Search for new phenomena in events containing a same-flavour opposite-sign dilepton pair, jets, and large missing transverse momentum in s√=13 TeV pp collisions with the ATLAS detector.” The European Physical Journal C 77 (3) (March). doi:10.1140/epjc/s10052-017-4700-5.1434-6044http://nrs.harvard.edu/urn-3:HUL.InstRepos:33058581Two searches for new phenomena in final states containing a same-flavour opposite-lepton (electron or muon) pair, jets, and large missing transverse momentum are presented. These searches make use of proton--proton collision data, collected during 2015 and 2016 at a centre-of-mass energy s√=13 TeV by the ATLAS detector at the Large Hadron Collider, which correspond to an integrated luminosity of 14.7 fb−1. Both searches target the pair production of supersymmetric particles, squarks or gluinos, which decay to final states containing a same-flavour opposite-sign lepton pair via one of two mechanisms: a leptonically decaying Z boson in the final state, leading to a peak in the dilepton invariant-mass distribution around the Z boson mass; and decays of neutralinos (e.g. χ̃ 02→ℓ+ℓ−χ̃ 01), yielding a kinematic endpoint in the dilepton invariant-mass spectrum. The data are found to be consistent with the Standard Model expectation. Results are interpreted in simplified models of gluino-pair (squark-pair) production, and provide sensitivity to gluinos (squarks) with masses as large as 1.70 TeV (980 GeV).en-USJournal Article2017-06-2010.1140/epjc/s10052-017-4700-5