  The charge asymmetry in t t-bar events is measured using dilepton final
states produced in pp collisions at the LHC at sqrt(s) = 8 TeV. The data
sample, collected with the CMS detector, corresponds to an integrated
luminosity of 19.5 inverse femtobarns. The measurements are performed using
events with two oppositely charged leptons (electrons or muons) and two or more
jets, where at least one of the jets is identified as originating from a bottom
quark. The charge asymmetry is measured from differences in kinematic
distributions, unfolded to the parton level, of positively and negatively
charged top quarks and leptons. The t t-bar and leptonic charge asymmetries are
found to be 0.011 +/- 0.011 (stat) +/- 0.007 (syst) and 0.003 +/- 0.006 (stat)
+/- 0.003 (syst), respectively. These results, as well as charge asymmetry
measurements made as a function of the invariant mass, rapidity, and transverse
momentum of the t t-bar system, are in agreement with predictions of the
standard model.
