CROSS-CORRELATING CMB POLARIZATION WITH LOCAL LARGE SCALE STRUCTURES
K. BENABED (a), F. BERNARDEAU (c), L. VAN WAERBEKE (b)
(a) SPhT, C.E. De Saclay, 91191 Gif-Sur-Yvette, France
(b) CITA, 60 St George Str.,Toronto M5S 3H8 Ontario, Canada


Abstract:
We study heterogeneous quantities that efficiently cross-correlate the lensing information encoded in CMB polarization and large-scale structures recovered from weak lensing galaxy surveys. These quantities allow us to take advantage of the special features of weak lensing effect on CMB (B)-polarization and of the high (40%) cross-correlation between the two data sets. We show that these objects are robust to filtering effects, have a low intrinsic cosmic variance (around 8% for small 100 square degrees surveys) and can be used as an original constraint on the vacuum energy density.