A search for new particles has been conducted using events with two high transverse momentum τ leptons that decay hadronically and at least two energetic jets. The analysis is performed using data from proton-proton collisions at $ \sqrt{s}=13 $ TeV, collected by the CMS experiment at the LHC in 2016 and corresponding to an integrated luminosity of 35.9 fb$^{−1}$. The observed data are consistent with standard model expectations. The results are interpreted in the context of two physics models. The first model involves right-handed charged bosons, W${R}$, that decay to heavy right-handed Majorana neutrinos, N${ℓ}$ (ℓ = e, μ, τ), arising in a left-right symmetric extension of the standard model. The model considers that N${e}$ and N${μ}$ are too heavy to be detected at the LHC. Assuming that the N${τ}$ mass is half of the W${R}$ mass, masses of the W${R}$ boson below 3.50 TeV are excluded at 95% confidence level. Exclusion limits are also presented considering different scenarios for the mass ratio between N${τ}$ and W${R}$, as a function of W${R}$ mass. In the second model, pair production of third-generation scalar leptoquarks that decay into ττbb is considered, resulting in an observed exclusion region with leptoquark masses below 1.02 TeV, assuming a 100% branching fraction for the leptoquark decay to a τ lepton and a bottom quark. These results represent the most stringent limits to date on these models.