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We hope that this web publication will in some small measure reflect the excitement of the RHIC and AGS program at Brookhaven, as explained by some of the people who are doing the experiments, analyzing the data, and writing the papers.
Wave Function Collapse During ρ0 Photoproduction in STAR
By Spencer Klein, Lawrence Berkeley National Laboratory
The phrase "relativistic heavy-ion collisions" usually brings
to mind violent interactions and complex, 1000-particle final
states. However, some RHIC collisions are the exact opposite -
the colliding ions act as point sources of fields; the fields
interact to produce a few-particle final state, leaving the
relativistic nuclei intact. This happens at large impact
parameters, where the nuclei do not interact hadronically; these
are ultra-peripheral collisions (UPCs). More...
The Relativistic Heavy Ion Collider at Brookhaven National
Laboratory is a world-class scientific research facility primarily
funded by the U.S. Department of Energy Office of Science. Hundreds
of physicists from around the world use RHIC to study what the
universe may have looked like in the first few moments after its
creation. What physicists learn from these collisions may help us
understand more about why the physical world works the way it does,
from the smallest subatomic particles, to the largest stars.