# Search for pair production of first-generation scalar leptoquarks at $\sqrt{s}=13\text{}\text{}\mathrm{TeV}$

09 April 2019

Abstract: A search for the pair production of first-generation scalar leptoquarks is performed using proton-proton collision data recorded at 13 TeV center-of-mass energy with the CMS detector at the LHC. The data correspond to an integrated luminosity of $35.9\text{}\text{}{\mathrm{fb}}^{-1}$. The leptoquarks are assumed to decay promptly to a quark and either an electron or a neutrino, with branching fractions $\beta$ and $1-\beta$, respectively. The search targets the decay final states comprising two electrons, or one electron and large missing transverse momentum, along with two quarks that are detected as hadronic jets. First-generation scalar leptoquarks with masses below 1435 (1270) GeV are excluded for $\beta =1.0\left(0.5\right)$. These are the most stringent limits on the mass of first-generation scalar leptoquarks to date. The data are also interpreted to set exclusion limits in the context of an $R$-parity violating supersymmetric model, predicting promptly decaying top squarks with a similar dielectron final state.

Published in: Physical Review D 99 (2019)