Title: Galaxy Bias from phase differences

Abstract: I will explain why we need to care about nonlinear galaxy bias and present a new statistic for investigating it: the galaxy-lensing phase difference. The statistic consists in taking the differences of the phases of the harmonic wave modes between the weak lensing convergence field and the galaxy count field. Using dark matter simulations populated with galaxies up to redshift z = 1 we have tested the performance of this estimator and found that it has the potential for competitive measurements of second-order galaxy bias in surveys like DES or LSST.