Halo bias and mass-concentration relation from stacked weak lensing by galaxy clusters

Giovanni Covone

Weak gravitational lensing is a powerful tool to investigate the structure of galaxy clusters and of
the Universe on its largest scales. I will report about recent results (based on data from the CFHT Lensing Survey)
to constrain the mass-concentration relation for galaxy clusters and the properties of the large-scale
distribution, in particular the measurement of the so-called halo bias on the cluster scale.
Moreover, I will present a method based on the joint analysis of clustering and
stacked shear to break the degeneracy between cosmological parameters and the halo bias in weak lensing measurements.