CMB constraints on running non-Gaussianity

We develop a complete set of tools for CMB forecasting, simulation and estimation of primordial running bispectra, arising from a variety of curvaton and single-field (DBI) models of Inflation. We validate our pipeline using mock CMB running non-Gaussianity realizations and test it on real data by obtaining experimental constraints on the $f_{\mathrm{N}\mathrm{L}}$ running spectral index, $n_{\rm NG}$,usingWMAP9-yeardata\mathrm{.}Ourfinalbounds(68\mathrm{\%}C\mathrm{.}L\mathrm{.})read$-0.6< n_{\rm NG}<1.4$,$-0.3< n_{\rm NG}<1.2$,$-1.1<n_{\rm NG}<0.7$ for the single-field curvaton, two-field curvaton and DBI scenarios, respectively. We show forecasts and discuss potential improvements on these bounds, using {\it Planck} and future CMB surveys.