# Presentation: 679567

##  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

## 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:  G vs x
- Key observables
- Open and hidden charm & beauty in pp, pA, AA
- Phenix detector upgrade
- Silicon vertex tracker with endcaps (LANL)

## Au+Au @ 200 GeV: Nuclear Suppression

***Au+Au @ 200 GeV: Nuclear Suppression***

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

- Next step: heavy quarks !

## AA Collisions:    Charm, Beauty Production

- 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

**Kharzeev, hep-ph/0106202**

**Charm/Light Spectral  Ratio**

## pA Charm, Beauty Production

***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

- Before Vertex detector1

**L. Frankfurt, M. Strikman, Eur. Phys. J A5, 293 (99)**

- Q = 2 GeV
- Q = 5 GeV
- Q = 10 GeV

- prompt photon

- cc

- bb

**(1) 500 GeV**

## G    Before vs After Si Vertex

-  c      e,  displaced vertex , D     Khigh-x
-  b      displaced J/low/high-x, b  e, displaced vertexhigh -x

*********G    Before vs After Si Vertex***

- Before vertex upgrade1

- G(x)

- x

- prompt photon

- cc

- bb

- GS95

**L. Frankfurt, M. Strikman, Eur. Phys. J A5, 293 **

**(1) 500 GeV**

## Si Vertex - Preliminary Design

***LANL Silicon Experience: CERN/L3,SSC,E789,MVD ***

## Example, B     J/

- pz (GeV/c)

- x1

- B    J/utilizing large acceptance muon arms
- Silicon Endcaps crucial !

- High Rates even with  cut:
- z-vertex > 0.1cm
- p+p:      J/   20K/year
- Au+Au: J/     7K/year

** **

**0.8%**

## Open Charm Forward Rapidity, Si Endcaps

- Inclusive D=>+X dominated by , K decays
- Muon DCA cut < 10 mm
- Extracts open charm signal !

- same y, pt range as J/
- critical for normalization

## Drell-Yan Measurements of Nucleon and NuclearStructure 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

**x**

**?**

**dbar/ubar**

## E906 Experimental Setup

**x****1**

**experiment / NLO theory**

***E906 Experimental Setup***

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

## Technology Transfer from HENP -> Medical Imaging and Homeland Security

***Technology Transfer from HENP ******-> Medical Imaging and Homeland Security***

- Compton Enhanced Gamma Reconstruction

**photo electric effect**

- 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

## 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**

***Compton Enhanced ******Gamma Reconstruction***

## 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

**Source:1 MeV @ 100m**
**1000s    10****5 ****photons/s**

**Silicon**
**Pixel**

##  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

## Plan for Physics

***Plan for Physics***

**2003**

**2004**

**2005**

**2006**

**2007**

**2008**

**Collisions**

**d-Au p-p**

**Au-Au pol. p-p**

**Si-Si**

**A-A p-p**

** ****p-A**

**500 GeV**** p-p ****120 GeV  FNAL**

**p-A Physics A-A Baseline **

**Open Charm Open Beauty**** **J/,** **’

**Current view of the run plan**

## Construction in the Next Five Years

***Construction ******in the Next Five Years***

**2003**

**2004**

**2005**

**2006**

**2007**

**2008**

**CD**

**R&D**

**Construction**

**R&D**

**Construction**

**PHENIX SVX**

**E906 Muon-ID**

**Funding Proposal**

**LOI**

**Compton**

**LDRD**

**Constr.**

**Next Generation**

## Summary

- Create consistent physics picture
- gluons, light and heavy quarks
- Collider program
- Take full advantage of Muon Arms
- J/,** **’, 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