Particle Identification

• Barrel Region (-1.70<η<1.70)
  • DIRC: e/π/K/p
    • π/K ≥ 3σ up to 6 GeV, ≥ 4σ up to 8 GeV
    • K/p ≥ 3σ up to 12 GeV
    • e/π 10:1 for 0.7 < p < 1.2 GeV/c
  • EMCal
    • γ/π⁰ discrimination up to 14 GeV (can be improved with preshower layer)
  • Instrumented Flux Return
    • Muon vs neutral hadron discrimination
    • Neutral hadron (n,K_S) angular resolution ~20 mrad
• Electron Endcap (-4.0 <η < 1.7)
  • Time-of-Flight: Low-Gain Avalanche Detector (LGad)
    • Goal: < 30 ps rms @ 1.2 m from IP
    • Example detector: ATLAS High Granularity Timing Detector (HGTD)
  • PbWO4 Crystal EM Calorimeter
  • Instrumented Flux return
• Ion Endcap (1.7 < η < 4.0)
  • Dual-RICH (Aerogel + heavy gas)
    • pi/K/p > 3σ discrimination from 10 to 60 GeV/c
  • W-Shashlik EMCal
  • High Granularity Hadronic Calorimetry