Before revision:  We use dynamical renormalization group approach to study a stochastic model for chemotactic particles in which we introduce polarization effects in chemotaxis.
After revision:  We develop a systematic coarse-graining scheme using which we can construct a general theoretical framework to study many-body effects in chemotactic populations. The framework unveils a polarization-induced coupling term, which originates from quorum effects and can compete with the chemotactic drift term. We use the dynamical renormalization group approach to study a stochastic model for chemotactic particles in which we introduce polarization effects in chemotaxis.