  In QCD at large enough isospin chemical potential Bose-Einstein Condensation
(BEC) takes place, separated from the normal phase by a phase transition. From
previous studies the location of the BEC line at the physical point is known.
In the chiral limit the condensation happens already at infinitesimally small
isospin chemical potential for zero temperature according to chiral
perturbation theory. The thermal chiral transition at zero density might then
be affected, depending on the shape of the BEC boundary, by its proximity. As a
first step towards the chiral limit, we perform simulations of 2+1 flavors QCD
at half the physical quark masses. The position of the BEC transition is then
extracted and compared with the results at physical masses.
