Mollified moments of cubic Dirichlet L-functions over the Eisenstein field

Abstract

We prove, assuming the generalized Riemann Hypothesis (GRH) that there is a positive density of L-functions associated with primitive cubic Dirichlet characters over the Eisenstein field that do not vanish at the central point s=1/2. This is achieved by computing the first mollified moment, which is obtained unconditionally, and finding a sharp upper bound for the higher mollified moments for these L-functions, under GRH. The proportion of non-vanishing is explicit, but extremely small.