My global lambda polarization talk for the 32nd WWND (March 2016) https://indico.cern.ch/event/435555/

Abstract: Non-central heavy-ion collisions provide a system with
non-zero total angular momentum which can be transferred, in part, to
the fireball via baryon stopping. It has been predicted that this
angular momentum will lead to a net spin of emitted particles through
coupling with the bulk material. Due to its parity violating decay the
$\Lambda$ is self-analyzing, which allows us to associate the daughter proton
decay direction with $\Lambda$ spin. Ultimately this allows us to use them as
a probe of net-particle spin. I will present preliminary STAR measurements
of the net $\Lambda$ polarization from Au+Au collisions at 7.7, 11.5, 14.5,
19.6, 27, and 39 GeV.