Search for Pair-production of First Generation Scalar Leptoquarks in pp Collisions at sqrt s = 8 TeV

A search for pair-production of first generation scalar leptoquarks is performed in the final states containing two electrons and at least two jets or an electron, a neutrino, and at least two jets using proton-proton collision data at $\sqrt{s}=8$ TeV. The data were collected by the CMS detector at the LHC, corresponding to an integrated luminosity of 19.6 fb$^{-1}$. First generation scalar leptoquarks with masses less than 1005 (845) GeV are excluded for $\beta = 1(0.5)$, where $\beta$ is the branching fraction of a leptoquark to a charged lepton and a quark. These limits are the most stringent limits on first generation leptoquarks to date.