An inclusive search for new phenomena in final states with one or more jets and missing transverse momentum at 13 TeV with the AlphaT variable

A search for new-physics phenomena is performed in final states containing one or more jets and an imbalance in transverse momentum in pp collisions at a centre-of-mass energy of 13 TeV. The analysed data sample, recorded with the CMS detector in 2016 at the CERN Large Hadron Collider, corresponds to an integrated luminosity of 12.9/fb. Several kinematic variables are employed to strongly suppress the dominant background, multijet production from quantum chromodynamics, as well as discriminate effectively between other standard model and new-physics processes. The search provides sensitivity to a broad range of new-physics models that yield a stable weakly interacting massive particle. The observed candidate events are found to agree with the expected contributions from standard model processes. The result is interpreted in the mass parameter space of simplified supersymmetric models that assume the gluino-mediated and direct production of pairs of third-generation squarks. The gluino mass, and bottom and top squark masses, are excluded up to 1775, 1025, and 875 GeV, respectively.