Search for New Physics in Channels with Two Higgs Bosons Decaying to b Quarks and Missing Transverse Momentum in Proton-Proton Collisions at 13 TeV

Results are presented from a search for new physics beyond the standard model in proton-proton collisions in final states containing two Higgs bosons, each decaying via H→bb, and large missing transverse momentum. The search uses a data sample accumulated by the CMS experiment at the LHC in 2016–2018, corresponding to an integrated luminosity of 137 fb$^{-1}$. Two complementary methods are used, providing coverage of different regions of phase space according to whether the two b jets from a Higgs-boson decay are resolved into separate, small-radius jets or instead overlap into a single, large-radius jet. Results are presented and interpreted using simplified models of supersymmetry involving the direct production of electroweak SUSY partners or alternatively the strong production of gluino pairs decaying to a pair of Higgs bosons via cascade processes.