  Interacting bosons generically form a superfluid state. In the presence of
disorder it can get converted into a compressible Bose glass state. Here we
study such transition in one dimension at moderate interaction using
bosonization and renormalization group techniques. We derive the two-loop
scaling equations and discuss the phase diagram. We find that the correlation
functions at the transition are characterized by universal exponents in a
finite region around the fixed point.
