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Recent News: Read about the Phobos participation in the June 18, 2003 BNL colloquium and press conference on d+Au data.  Note that the  PHOBOS d+Au results (with tables of data) are now posted.

Gold-Gold Ion Collision at PHOBOS at highest RHIC energies: 100 GeV/nucleon

A spectacular Gold-Gold collision at the maximum RHIC energy as seen by Phobos. Phobos consists of a cylindrical array of silicon detectors and two spectrometer arms surrounding the interaction region where the gold nuclei collide. The colored dots show the locations where silicon was struck by the thousands of produced particles. The red lines are reconstructed trajectories of some of those particles. The precise location where the nuclei collided can clearly be seen.

Counting charged particles: Average number of charged particles per nucleon, measured at about 90 degrees to the beam direction, as a function of center of mass of colliding ions.

Brookhaven Press Release

 

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