What does PHENIX measure?

• Hadrons

  Final-state “debris” as quark-gluon plasma returns to ordinary matter.
  

• Vector mesons, especially J/y’s

  • Look for their disappearance (~ melting)

• Photons

  • “Real” g
  • “Massive” g* (decays to e+e- or m+m- pairs)

    • The blackbody radiation from the collision

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Why is PHENIX different, what do we measure.

Phenix consists of 12 sub-detectors for tracking and PID.