Two related searches for Standard Model and inclusive beyond the Standard

Model physics with a final state containing a pair of same-charged leptons

and jets are performed using a sample of $\sqrt{s}=13$ TeV data corresponding to an

integrated luminosity of 137~fb${}^{-1}$, collected by the CMS detector between 2016

and 2018. The inclusive search observes no excess above the Standard Model

and thus places constraints on supersymmetric models with pair production of

gluinos and squarks. Gluino masses are excluded up to 2.1 TeV, while top and

bottom squarks are excluded up to 0.9 TeV. The Standard Model search measures

the cross-section of the production of four top quarks using both cut-based

and multivariate approaches. The observed (expected) significance of the

multivariate approach is 2.6 (2.7) standard deviations, with a measured

cross-section of $12.6^{+5.8}_{-5.2}$ fb, consistent with the Standard Model

prediction of $12.0^{+2.2}_{-2.5}$ fb. These results are translated into

constraints on the Yukawa coupling of the top quark, heavy scalar or

pseudoscalar production in a type II 2HDM scenario or models of dark matter,

couplings between the top quark and new light particles, and

the Higgs boson oblique parameter.