  A search is presented for physics beyond the standard model in final states
with two opposite-sign, same-flavor leptons, jets, and missing transverse
momentum. The data sample corresponds to an integrated luminosity of 2.3
inverse femtobarns of proton-proton collisions at sqrt(s) = 13 TeV collected
with the CMS detector at the LHC in 2015. The analysis uses the invariant mass
of the lepton pair, searching for a kinematic edge or a resonant-like excess
compatible with the Z boson mass. Both search modes use several event
categories in order to increase the sensitivity to new physics. These
categories are based on the rapidity of the leptons, the multiplicity of jets
and b jets, the scalar sum of jet transverse momenta, and missing transverse
momentum. The observations in all signal regions are consistent with the
expectations from the standard model, and the results are interpreted in the
context of simplified models of supersymmetry.
