A Chiral Universe

When the universe was newborn (just a couple of microseconds old) it displayed a handedness, or chirality, that, according to a recent article in Science, physicists are finally able to reproduce in the laboratory.  Dmitri Kharzeev and his team at the Relativistic Heavy Ion Collider at the Brookhaven National Laboratory noticed that the strong force behaves differently when things get hot enough.  At temperatures of four trillion degrees Celsius—the hottest temperature ever measured in a lab—protons and neutrons, smashed out of gold nuclei, turn into a flowing plasma of quarks and gluons.  The plasma, which behaves like a liquid, seems not to be mirror symmetric.  Continue reading “A Chiral Universe”