  A search for baryon number violation (BNV) in top-quark decays is performed
using pp collisions produced by the LHC at sqrt(s) = 8 TeV. The top-quark decay
considered in this search results in one light lepton (muon or electron), two
jets, but no neutrino in the final state. Data used for the analysis were
collected by the CMS detector and correspond to an integrated luminosity of
19.5 inverse femtobarns. The event selection is optimized for top quarks
produced in pairs, with one undergoing the BNV decay and the other the standard
model hadronic decay to three jets. No significant excess of events over the
expected yield from standard model processes is observed. The upper limits at
95% confidence level on the branching fraction of the BNV top-quark decay are
calculated to be 0.0016 and 0.0017 for the muon and the electron channels,
respectively. Assuming lepton universality, an upper limit of 0.0015 results
from the combination of the two channels. These limits are the first that have
been obtained on a BNV process involving the top quark.
