RHIC/HENP 5 Year Plan

1. RHIC/HENP 5 Year Plan Gerd J. Kunde • Physics - Collider Physics (RHIC) - Fixed Target Physics (FNAL) • Projects - Silicon Endcap (Phenix) - Muon-Id (E906) - Compton Enhanced Gamma Reconstruction • Plans 2003-2008 beyond

2. Collider Physics Goals • Physics priorities for the latter part of this decade • Properties of earliest, densest stage of Au+Au (QGP) • Partonic energy loss, shadowing, Cronin effect • Modification of gluon structure function in nuclei • Spin carried by gluons: DG vs x • Key observables • Open and hidden charm & beauty in pp, pA, AA • Phenix detector upgrade • Silicon vertex tracker with endcaps (LANL)

3. Cronin & initial state effects ? Fragmentation - recombination ? QGP composition: q vs. g ? Partonic energy loss Fries et al. nucl-th/0301087 I.Vitev hep-ph/020419 Wang & Wang hep-ph/0202105 peripheral Charged Hadrons Neutral Pions central Au+Au @ 200 GeV: Nuclear Suppression • Next step: heavy quarks !

4. Heavy/Light Quenching factors hot matter cold matter • Charm is critical baseline for J/y suppression • open vs. hidden charm • Charm provides key info. for di-lepton continuum AA Collisions: Charm, Beauty Production Kharzeev, hep-ph/0106202 • Possible charm enhancement in earliest stage of reaction • High-pt heavy-quarks may experience a smaller energy energy loss • Kharzeev et al. predict reduced gluon Bremsstrahlung Charm/Light Spectral Ratio

5. WITH Vertex detector1 pA Charm, Beauty Production • Heavy-flavor production via gg q+q • Extracting gluon structure function nuclei, shadowing • Vertex detector provides broader range in x • Into predicted shadowing region L. Frankfurt, M. Strikman, Eur. Phys. J A5, 293 (99) Before Vertex detector1 prompt photon Q = 2 GeV Q = 5 GeV Q = 10 GeV cc bb (1) 500 GeV

6. WITH vertex upgrade1 DG Before vs After Si Vertex L. Frankfurt, M. Strikman, Eur. Phys. J A5, 293 GS95 Before vertex upgrade1 DG(x) prompt photon cc bb x • jet-axis for photon+jet-axis constraint on x • c e, m displaced vertex , D Kp high-x • b displaced J/y low/high-x, b e, displaced vertexhigh -x (1) 500 GeV

7. LANL Si Endcaps Si Vertex - Preliminary Design LANL Silicon Experience: CERN/L3,SSC,E789,MVD

8. J/y from B direct J/y z vertex (cm) Example, B J/y mm 0.8% x1 pz (GeV/c) High Rates even with cut: z-vertex > 0.1cm p+p: J/y20K/year Au+Au: J/y7K/year B J/y, utilizing large acceptance muon arms Silicon Endcaps crucial !

9. Open Charm Forward Rapidity, Si Endcaps • Inclusive D=>m+X dominated by p, K decays • Muon DCA cut < 10 mm • Extracts open charm signal ! same y, pt range as J/y critical for normalization

10. Drell-Yan Measurements of Nucleon and NuclearStructure with the FNAL Main Injector • Ratio of the d-antiquark to u-antiquark distributions in the proton • E866 measurements unexpectedly show considerable x dependence in this ratio at x >0.2 ? • PAC approved experiment E906 will measure out to larger x • Partonic energy loss via Drell-Yan • Drell-Yan cross sections for nuclear targets dbar/ubar x

11. Expected Precision E906 Experimental Setup • LANL proposes to build the Muon-Id based on proportional tubes experiment / NLO theory x1

12. Technology Transfer from HENP -> Medical Imaging and Homeland Security • Compton Enhanced Gamma Reconstruction Reconstruction of Compton Scattered Gammas • Collaboration with CIMA (Compton Imaging for Medical Applications) • PET prostate probe based on Silicon pad sensors • Very high resolution (sub-millimeter) small animal PET instrument based on Silicon sensors • Novel scheme for a true 3D parallax free PET scanner using the CERN Hybrid Photon Detectors • Exploratory research on a Compton Telescope/Camera using the techniques above for Homeland Security Applications • Collaboration with CIMA (Compton Imaging for Medical Applications) • PET prostate probe based on Silicon pad sensors • Very high resolution (sub-millimeter) small animal PET instrument based on Silicon sensors • Novel scheme for a true 3D parallax free PET scanner using the CERN Hybrid Photon Detectors • Exploratory research on a Compton Telescope/Camera using the techniques above for Homeland Security Applications photo electric effect

13. Cherenkov Ring Compton Enhanced Gamma Reconstruction CERN Development of single photon counting Hybrid Photo Diode with integrated readout electronics Currently in the process of writing a LDRD on Compton Enhanced Gamma Reconstruction

14. Existing Compton Camera Research (P-25 with NIS-6 and NIS-2) • Mission • Detect and track nuclear weapon or radiation dispersal device (RDD) • Development of next-generation instruments for nuclear astrophysics • Challenges • Weak sources, backgrounds, detection in real time Silicon Pixel Source:1 MeV @ 100m 1000s 105 photons/s

15. RHIC/HENP 5 Year Plan • Physics - Collider Physics (RHIC) - Fixed Target Physics (FNAL) • Projects - Silicon Endcap (Phenix) - Muon-Id (E906) - Compton Enhanced Gamma Reconstruction • Plans 2003-2008 beyond • Physics - Collider Physics (RHIC) - Fixed Target Physics (FNAL) • Projects - Silicon Endcap (Phenix) - Muon-Id (E906) - Compton Enhanced Gamma Reconstruction • Plans 2003-2008 beyond

16. Cronin d-Au J/Y ! J/Y Shadowing Gluon Spin Heavy Quark Production E906- J/Y pp DG(x) Plan for Physics Open Charm Open BeautyJ/Y,Y ’ p-A Physics A-A Baseline 2003 2004 2005 2006 2007 2008 Collisions d-Au p-p 500 GeV p-p 120 GeV FNAL p-A Au-Au pol. p-p Si-Si A-A p-p Current view of the run plan

17. Construction in the Next Five Years 2003 2004 2005 2006 2007 2008 PHENIX SVX Construction CD LOI R&D Funding Proposal E906 Muon-ID R&D Construction Compton Constr. Next Generation LDRD

18. Summary • Create consistent physics picture • gluons, light and heavy quarks • Collider program • Take full advantage of Muon Arms • J/Y,Y ’, Upsilon physics ! • Build Si endcaps for PHENIX • charm and b-physics ! • Fixed target program • Build Muon-id for E906 • dbar/ubar up to larger x • Homeland security/Medical imaging • Compton Enhanced Gamma Reconstruction