Combined constraints on first generation leptoquarks

In this article we perform a combined analysis of low energy precision constraints and LHC searches for leptoquarks which couple to first generation fermions. Considering all ten leptoquark representations, five scalar vector ones, study at the frontier from $K\to\pi\nu\nu$, $K\to\pi e^+e^-$, $K^0-\bar K^0$ $D^0-\bar D^0$ mixing, as well experiments searching parity violation (APV QWEAK). We include $s$-channel single resonant production, pair production Drell-Yan-like signatures leptoquarks. Interestingly, find that recent non-resonant di-lepton ATLAS provides stronger bounds than recasted so far constrain $t$-channel Taking into account these bounds, observe none representations can address so-called "Cabibbo angle anomaly" via direct contribution super-allowed beta decays.