Search for dark matter production in association with jets, or hadronically decaying W or Z boson at $\sqrt{s} = 13$ TeV

A search for new physics is performed using events with large missing transverse momentum and one or more jets with high transverse momenta in a data sample of proton-proton interactions at the centre-of-mass energy of 13 TeV collected with the CMS detector at the LHC in 2015. This includes a dedicated search for new physics in events in which a hadronically decaying W or Z boson is produced in association with large missing transverse energy. The data correspond to an integrated luminosity of 2.3 fb$^{-1}$. Results are presented in terms of limits on the dark matter production in association with jets and vector bosons using simplified models, and on the decay of the standard model Higgs boson to invisible particles. Vector and axial-vector mediators with masses up to 1.3 TeV are excluded at a $90\%$ confidence level. The expected and observed upper limits on the invisible branching fraction of the standard model Higgs boson are found to be 0.84 and 0.85, respectively, at a $95\%$ confidence level.