  A search for new physics is performed using events that contain one or more
jets, no isolated leptons, and a large transverse momentum imbalance, as
measured through the MT2 variable, which is an extension of the transverse mass
in events with two invisible particles. The results are based on a sample of
proton-proton collisions collected at a center-of-mass energy of 13 TeV with
the CMS detector at the LHC, and that corresponds to an integrated luminosity
of 2.3 inverse femtobarns. The observed event yields in the data are consistent
with predictions for the standard model backgrounds. The results are
interpreted using simplified models of supersymmetry and are expressed in terms
of limits on the masses of potential new colored particles. Assuming that the
lightest neutralino is stable and has a mass less than about 500 GeV, gluino
masses up to 1550-1750 GeV are excluded at 95% confidence level, depending on
the gluino decay mechanism. For the scenario of direct production of
squark-antisquark pairs, top squarks with masses up to 800 GeV are excluded,
assuming a 100% branching fraction for the decay to a top quark and neutralino.
Similarly, bottom squark masses are excluded up to 880 GeV, and masses of
light-flavor squarks are excluded up to 600-1260 GeV, depending on the degree
of degeneracy of the squark masses.
