why not just measurep/p?

• answer: charged particle identification at high pT often relies on Čerenkov. PHENIX uses a RICH for particle ID

  • one threshold: can be used to separate  from K, p at ~6 GeV/c, p from K,  at ~17 GeV/c

• need a second Čerenkov, with a second threshold, to separate kaons from protons

Notes: