Parity violation in the QCD strong force?
"A very interesting thing happened in these extreme conditions," Sandweiss says. "Parity violation is very difficult to detect, but the magnetic field in conjunction with parity violation gave rise to a secondary effect that we could detect."
Sandweiss and the team — which includes Yale physics research scientists Evan Finch, Alexei Chikanian and Richard Majka — found that quarks of a like sign moved together: Up quarks moved along the magnetic field lines, while down quarks traveled against them. That the quarks could tell the difference in directions suggested to the researchers that symmetry had been broken.
The results were so unexpected that Sandweiss and his colleagues waited more than a year to publish them, spending that time searching for an alternative explanation. The physicist is still quick to point out that the effect only suggests parity violation — it doesn't prove it — but the STAR collaboration has decided to open up the research to scrutiny by other physicists."