RHICHENP 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 AuAu
  (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
AuAu _at_ 200 GeV Nuclear Suppression

• Cronin initial state effects ?
• Fragmentation - recombination ?
• QGP composition q vs. g ?
• Partonic energy loss

• Next step heavy quarks !

4
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
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
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 photonjet-axis constraint on
  x
• c e, m displaced vertex , D Kp high-x
• b displaced J/y low/high-x, b e,
  displaced vertex high -x

(1) 500 GeV
7
Si Vertex - Preliminary Design
LANL Silicon Experience CERN/L3,SSC,E789,MVD
8
Example, B J/y mm

0.8
x1
pz (GeV/c)
High Rates even with cut z-vertex gt 0.1cm pp
J/y 20K/year AuAu J/y 7K/year
B J/y, utilizing large acceptance muon
arms Silicon Endcaps crucial !
9
Open Charm Forward Rapidity, Si Endcaps

• Inclusive DgtmX dominated by p, K decays
• Muon DCA cut lt 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 gt0.2

?

• 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
E906 Experimental Setup
experiment / NLO theory
x1

• LANL proposes to build the Muon-Id based on
  proportional tubes

12
Technology Transfer from HENP -gt 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
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
Source1 MeV _at_ 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
Plan for Physics
Open Charm Open Beauty J/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
RD
LOI
Funding Proposal
E906 Muon-ID
RD
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