Current PHENIX pt resolution

Upgraded improves pt/pt 5X at 40 GeV/c for W e

West carriage Resolution

East carriage Resolution

Schedule and Cost• 24 Months from Start to Finish• Cost

– $900k Electronics– $250k Electronics Infrastructure– $200k Mechanics(Detector+Infrastructure+Radiators)– $100k Gas System Upgrade

Total $1.45M Capital +$100k R&D Operating$500k Xenon Gas Operating

Summary• High pt upgrades extend PHENIX’s strengths into new andexciting areas of physics • Extensive list of topics to investigate in AA, pA and pp• Well matched to machine plans for increased luminosity

High pt Physics with PHENIX• Heavy Flavor Physics

– J/suppression in A-A vs Centrality,pt,– J/’ , production /suppression– J/ vs Charm, DY continuum via single leptons, e pairs– J/ at different rapidities central vs muon arms– Single Leptons as probe of B production, B contribution to

J/ – Charm production, high pt photons and J/ ’ in pA

physics to disentangle gluon shadowing, nuclear absorption• Jet Physics

– Jet quenching at high pt with leading charged particle >5 GeV/c

• Spin Physics– W+/W- production, W e

Charged Particle Rejection with TRD

4 plane TRD

6 plane TRD

90% Electron Efficiency

PHENIX Central SpectrometerUpgrade high pt resolution in the

West arm and electron ID in both arms with Tracking/TRD

• Increases pt resolution in West Arm by 5X at 40 GeV/c

• Increases electron ID capability 100X for pt > 3 GeV/c

• Enhances EMCal e/hadron rejection with better E-p match

• Combine TRD, RICH and EMCal for particle ID coverage upto 12 GeV/c

Expected Statistics for High Luminosity RHIC Operation

Assume: – L of RHIC 10X current design value, Au-Au,

30 week run, NN(J/nb

Central Arms Central 10%

Min Bias Muon Arms Central 10%

Min Bias

J/ 700k 2M J/ 3.5M 10M

14k 40k 70k 200k

800 2.5k 1.6k 5k

DY(M > 4GeV) 2.5k 7k DY(M > 4GeV) 15k 40k