A search is presented for extra spatial dimensions, quantum black holes, and
quark contact interactions in measurements of dijet angular distributions in proton-proton
collisions at √
s = 13 TeV. The data were collected with the CMS detector at the LHC
and correspond to an integrated luminosity of 2.6 fb−1
. The distributions are found to
be in agreement with predictions from perturbative quantum chromodynamics that include
electroweak corrections. Limits for different contact interaction models are obtained.
In a benchmark model, valid to next-to-leading order in QCD and in which only lefthanded
quarks participate, quark contact interactions are excluded up to a scale of 11.5
and 14.7 TeV for destructive or constructive interference, respectively. The production
of quantum black holes is excluded for masses below 7.8 or 5.3 TeV, depending on the
model. The lower limits for the scales of virtual graviton exchange in the Arkani-HamedDimopoulos-Dvali
model of extra spatial dimensions are in the range 7.9–11.2 TeV, and are
the most stringent set of limits available.