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 Ω_{m} and σ_{8} 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.