Search for pair-produced diquark resonances in proton-proton collisions with the CMS detector at 13 TeV

A search is performed for the pair production of resonances decaying to two light quarks or one light quark and one bottom quark. The search is conducted separately for light resonances between 80 and 400 GeV in mass, when the hadronization of the quarks is collimated enough to be reconstructed as a single jet producing a dijet final state, and for heavy resonances above 400 GeV in mass, when the decay products generate pairs of hadronic jets producing a four-jet final state. The data used were collected with the CMS detector in 2016 at the CERN LHC from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1. The mass spectra are analyzed to look for new resonant particles, and are found to be consistent with standard model expectations. These results are interpreted in the framework of R-parity-violating supersymmetry assuming the pair production of scalar top quarks decaying via the couplings. Upper limits are set at the 95% confidence level on the pair production cross section of top squarks as a function of the top squark mass.