Constraints on massive neutrinos from the pairwise kinematic Sunyaev-Zel’dovich effect

We present the mean pairwise momentum of clusters, as observed through the kinematic SunyaevZel'dovich (kSZ) effect, as a novel probe of massive neutrinos. Central to the constraints is a distinctive scale dependency of the kSZ neutrino signature on the mean pairwise momentum of clusters that we do not expect to be mirrored in systematic effects that change the overall amplitude of the signal, like the cluster optical depth. Assuming a minimal [Lambda]CDM cosmology including massive neutrinos with Planck primordial CMB priors combined with conservative kSZ specifications, we forecast 68% upper limits on the neutrino mass sum of 310, 240, and 110 meV for "Stage II", "Stage III", and "Stage IV" surveys respectively, compared to the Planck alone forecast of 540 meV. These forecasts include the ability to simultaneously constrain the neutrino mass sum and the mass-averaged optical depth of the cluster sample in each redshift bin.