Search for supersymmetry in final states with disappearing tracks in proton-proton collisions at $13~\mathrm{TeV}$

A search is presented for charged, long-lived supersymmetric particles in final states with one or more disappearing tracks. The search is based on a sample of proton-proton collisions at a center-of-mass energy of $13~\mathrm{TeV}$ collected with the CMS detector at the CERN LHC between 2016 and 2018, corresponding to an integrated luminosity of $137~\mathrm{fb}^{-1}$. The search is performed over final states characterized by varying numbers of jets, b-tagged jets, electrons, and muons. The transverse length of signal-candidate tracks is used to characterize the lifetimes of wino-like and higgsino-like charginos produced in the context of the minimal supersymmetric standard model. The d$E/$d$x$ energy loss of candidate tracks is used to increase the sensitivity to charginos with a large mass due to their typically small Lorentz boost in the CMS detector. The observed results are found to be statistically consistent with the background-only hypothesis. Limits on the pair production cross section of gluinos and squarks are presented in the framework of simplified models of supersymmetric particle production and decay, and for electroweakino production based on a model of higgsino dark matter.