  The Glasgow reweighting method is evaluated for SU(2) lattice gauge theory at
nonzero \mu and finite T. We establish that the ' overlap problem' of SU(3)
measurements, in which the transition points determined from thermodynamic
observables have an unphysical dependence on the value of \mu used in the
reweighting persists for SU(2). By combining the information from different
lattice ensembles we alleviate sampling bias in the fugacity expansion, and
identify the Lee-Yang zeros associated with the transition to a high density
phase that can plausibly be associated with diquark condensation. We also
confirm the existence of a line of first order transitions above a critical
point in the T-\mu plane previously identified by effective chiral lagrangian
calculations.
