A search for pair production of second-generation leptoquarks is performed using proton-proton collision data collected at $\sqrt{s}=13\mathrm{TeV}$ in 2016 with the CMS detector at the CERN LHC, corresponding to an integrated luminosity of $35.9{\mathrm{fb}}^{-1}$. Final states with two muons and two jets, or with one muon, two jets, and missing transverse momentum are considered. Second-generation scalar leptoquarks with masses less than 1530(1285) GeV are excluded for $\beta =1.0(0.5)$, where $\beta$ is the branching fraction for the decay of a leptoquark to a charged lepton and a quark. The results of the search are also interpreted as limits on the pair production of long-lived top squarks in an $R$-parity violating supersymmetry model that has a final state with two muons and two jets. These limits represent the most stringent limits to date on these models.

• Received 15 August 2018

DOI:https://doi.org/10.1103/PhysRevD.99.032014

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