Consistency of Dark Energy Survey Year 1 Galaxy Clusters with Planck

The recent Dark Energy Survey Year 1 (DES-Y1) analysis of galaxy cluster abundances and weak lensing produced ωm and σ8 constraints in 5.6σ tension with those derived from Planck. It is suggested in that work that this tension is driven by unmodeled systematics in optical cluster selection. We present a novel simulation-based forward modeling framework that explicitly incorporates cluster selection into its model predictions. Applying this framework to the DES-Y1 data we find consistency with Planck, possibly resolving the tension found in the DES-Y1 analysis. An extension of this approach to the final DES data set will produce robust constraints on ΛCDM parameters and correspondingly strong tests of cosmological models.