Brookhaven's STAR Experiment Spots Unexpected Dip Hinting at Nuclear 'Critical Point'
Physicists at Brookhaven National Laboratory's RHIC facility analyzed about 1 billion gold-nuclei collisions and found that particle momentum variations, instead of changing smoothly with collision energy, dipped before rising again. The STAR collaboration published the results on Sept. 22 in Physical Review Letters, noting the signal is statistically robust but not yet proof of a long-theorized transition point in nuclear matter.