Searches for scalar leptoquarks in pp collisions at √s = 8 TeV with the ATLAS detector

Abstract

Searches 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 √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 bν_τb¯v¯_τ and tν_τt¯v¯_τ 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_LQ1 < 1050 GeV for first-generation leptoquarks, m_LQ2 < 1000 GeV for second-generation leptoquarks, m_LQ3 < 625 GeV for third-generation leptoquarks in the bν_τb¯v¯_τ channel, and 200 < m_LQ3 < 640 GeV in the tν_τt¯v¯_τ channel.