  The results of a first search for CP violation in the production and decay of
top quark-antiquark (t t-bar) pairs are presented. The search is based on
asymmetries in T-odd, triple-product correlation observables, where T is the
time-reversal operator. The analysis uses a sample of proton-proton collisions
at sqrt(s) = 8 TeV collected by the CMS experiment, corresponding to an
integrated luminosity of 19.7 inverse femtobarns.. Events are selected having
one electron or muon and at least four jets. The T-odd observables are measured
using four-momentum vectors associated with t t-bar production and decay. The
measured asymmetries exhibit no evidence for CP-violating effects, consistent
with the expectation from the standard model.
