# Presentation: 937357

**RHIC II**
**Science and Perspective**
**with thanks (and apologies) to**** **
**A. Drees, J. Dunlop, A. Frawley, J. Harris, T. Hirano, ****R. Majka, L. McLerran, J. Nagle, T. Roser, U. Wiedemann**
**W.A. Zajc**
**Columbia University**

- PANIC

- 29-Oct-05

## Science or Perspective?

**Eric Blinman (Thursday’s after-dinner speaker)**
**“****Our investigations are indeed a science, because the stories that I tell are intended to be criticized.”**
**Implies my remarks will be more *****perspective***** than *****science *****:**
**My stories aren’t intended to be criticized    ;-)**
**My perspective is highly colored by **
**Planning efforts to fit a hugely varied physics program into****a very finite number of running weeks per year.**
**Service on the “Tribble Committee” :**
**Our science is under siege**
**We have achieved a  *****temporary*****  respite, won by**** **
**Existing successes of the program**
**Intense efforts of  P. Barnes, R. Milner, B. Müller, S. Vigdor****(also E. Hartouni, A. Mignery, J. Symons,...)**
**To continue, we must develop the case for OUTSTANDING science that can survive in a world of finite resources and (often non-logical) constraints.****  **
**(Don’t expect me to do that here)**

- PANIC

- 29-Oct-05

## Science Questions

**Uninteresting question:**
**What happens when I crash two gold nuclei together? **
**Interesting question:**
**Are there new states of matter at the highest temperatures and densities?**
**Compelling question:**
**What fundamental properties of our gauge theories of nature can be investigated experimentally?**

- PANIC

- 29-Oct-05

## Simple arguments to  motivate a QCD phase transition have a problem:
A simple Maxwell construction that predicts TC ~ 140 MeV also predicts a latent heat ~ 0.8 GeV/fm3 
However, the lattice tells us that the “real” QCD phase transition is not a phase transition at all, but a “smooth crossover”
Perhaps related to ignoring the critical role of quark (spin, helicity, chirality):
A gluon can not change a quark’s helicity:

But confinement requires helicity change:
“To understand the inside of the proton    you must understand     the outside of the proton.”     (R. Mawhinney)

**A simple Maxwell construction that predicts T****C**** ~ 140 MeV also predicts a latent heat ~ 0.8 GeV/fm****3**** **
**However, the lattice tells us that the “real” QCD phase transition is not a phase transition at all, but a “smooth crossover”**
**Perhaps related to ignoring the critical role of quark (spin, helicity, chirality):**
**A gluon can ****not**** change a quark’s helicity:**
**But confinement requires helicity change:**
**“****To understand the *****inside***** of the proton ****   you must understand ****    the *****outside***** of the proton.” ****    (R. Mawhinney)**

**Grand Connection**

**Bag****Wall**

**=**

- PANIC

- 29-Oct-05

## Grander Connections

**Theories of the Early Universe ****are replete with phase transitions**
**QCD is the only *****fundamental***** theory ****with a phase transition **
**    *****that is accessible to experiment(!)***

- PANIC

- 29-Oct-05

## Grandest Connection

**Emerging understanding(?) of **
**Regge trajectories:  **
**BARYONIC STATES IN QCD FROM GAUGE/STRING DUALITY AT LARGE N(C), ****G.F. de Teramond  and S.J. Brodsky, hep-th/0409074 **
**Deep Inelastic Scattering:**
**HARD SCATTERING AND GAUGE / STRING DUALITY, ****J. Polchinski and M.J. Strassler, Phys.Rev.Lett.88:031601,2002 hep-th/0109174 **
**Entropy: **
**ENTROPY AND TEMPERATURE OF BLACK 3-BRANES, ****S.S. Gubser, Igor R. Klebanov and A.W. Peet, Phys.Rev.D54:3915-3919,1996  hep-th/9602135 **
**Viscosity:**
**THE SHEAR VISCOSITY OF STRONGLY COUPLED N=4 SUPERSYMMETRIC YANG-MILLS PLASMA., G. Policastro, D.T. Son , A.O. Starinets,  Phys.Rev.Lett.87:081601,2001   hep-th/0104066 **
**via AdS/CFT correspondence**

- PANIC

- 29-Oct-05

## Disclaimer 

**Yes I know**
**‘****t Hooft limit of ****N ****=4 SSYM  ≠ QCD**
**I don’t care- **
**There is as much circumstantial evidence for the utility of these methods as there is for “perfect fluidity” of our sQGP...**
**Connections like these are essential **
**not only for progress in the strongly-coupled regime, **
**but also  **
**for expanding the intellectual breadth and appeal of our physics:**
**“**This suggests that AdS/CFT methods could indeed be useful in studying the physics of sQGP, and certainly gives strong motivation for continued experimental and lattice research.**”**
**    ****from  QCD AND STRING THEORY, I.R. Klebanov, to appear in the proceedings of 22nd International Symposium on Lepton-Photon Interactions at High Energy (LP 2005), Uppsala, Sweden, 30 Jun - 5 Jul 2005, hep-ph/0509087 **

**Disclaimer (well, not really) **

- PANIC

- 29-Oct-05

## The Uniqueness of RHIC

**The Uniqueness of RHIC**

- Outstanding questions about strongly interacting matter:
- How does matter behave at very high temperature and/or density?
- What is the nature of gluonic matter?
- How does this gluonic matter appear inside of strongly interacting particles?
- How are spin and baryon number distributed inside of nucleons?
- RHIC addresses all of these:

- PANIC

- 29-Oct-05

## RHIC: A Unique QCD Laboratory

**RHIC: A Unique QCD Laboratory**

**QCD**

**confinement**

**new phases**

**low x**
**color glass**

**  ****High T,******
**  ****QCP**

**p-spin**
**structure**

**RHIC**

**RHIC upgrades**

**  ****eRHIC   **

**Discovery****               ****Exploration               Precision****  ****   **

**R. Milner**

**WAZ**

- PANIC

- 29-Oct-05

## Lattice Gauge Theory

- Tests QCD

- Tests Confinement

- Computes Masses

- Compute Finite T QCD

-       QCDOC Project at BNL promises
- 10+ TFlops (x 2)
- allowing for computations
- with realistic quark masses
- RBRC

- PANIC

- 29-Oct-05

## QCD Lab

**QCD Lab = BNL RHIC + RHIC II + eRHIC + QCDOC + RBRC**
**A spectacular confluence of science, facilities, and opportunities**

- PANIC

- 29-Oct-05

## RHIC Success

- PANIC

- 29-Oct-05

## Success ≠ Done

**BRAHMS:**
**It is also clear that the unravelling of the physics of the matter state(s) observed at RHIC has just begun. In spite of the impressive advances that have been made in the last three years there are still many issues to be understood in detail, such as the differences in the high pT suppression of baryons and mesons and the quantitative energy and rapidity dependence of the final and initial state high pT suppression. Undoubtedly future measurements will shed new light on these and many other questions. We should not forget, however ,that there are also significant challenges for theory. In the opening chaptersof this document we remarked on the requirement that scientific paradigms must be falsifiable. We have yet to see a fully self consistent calculation of the entire reaction evolution at RHIC that in an unambiguous way demonstrates the impossibility of a hadronic description.**
**PHENIX:**
**In conclusion, there is compelling experimental evidence that heavy-ion collisions at RHIC produce a state of matter characterized by very high energydensities, density of unscreened color charges ten times that of a nucleon, large cross sections for the interaction between strongly interacting particles, strong collective flow, and early thermalization. Measurements indicate that this matter modifies jet fragmentation and has opacity that is too large to be explained by any known hadronic processes. This state of matter is not describable in terms of ordinary color-neutral hadrons, because there is no known self-consistent theory of matter composed of ordinary hadrons at th  measured densities. The most economical description is in terms of the underlying quark and gluon degrees of freedom. Models taking this approach have scored impressive successes in explaining many, but not all, of the striking features measured to date. There is not yet irrefutable evidence that this state of matter is characterized by quark deconfinement or chiral symmetry restoration, which would be a direct indication of quark-gluon plasma formation. The anticipated program of additional incisive experimental measurements combined with continued refinement of the theoretical description is needed to achieve a complete understanding of the state of matter created at RHIC.**
**PHOBOS:**
**One of the most important discoveries at RHIC is the evidence that, in central Au+Au collisions at ultra-relativistic energies, an extremely high energy den- sity system is created, whose description in terms of simple hadronic degrees of freedom is inappropriate. Furthermore, the constituents of this system ex-perience a significant level of interaction with each other inside the medium. These conclusions are based on very general and, to a large extent, model independent arguments. It is not claimed that the observed phenomena are unique to RHIC energies. Nor is it claimed that there is direct evidence in the data analyzed so far for color deconfinement or chiral symmetry restoration.**
**STAR:**
**The properties already delineated, with seminal contributions from STAR, point toward a dense, opaque, non-viscous, pre-hadronic liquid state that was not anticipated before RHIC. Deter-mining whether the quarks and gluons in this matter reach thermal equilibrium with one another before they become confined within hadrons, and eventually whether chiral symmetry is restored, are two among many profound questions one may ask. Further elaboration of the properties of this matter, with eyes open to new unanticipated features, remains a vital research mission, inde- pendent of the answer that nature eventually divulges to the more limited question that has been the focus of this document.**

- PANIC

- 29-Oct-05

## BRAHMS White Paper

**It is also clear that the unraveling of the physics of the matter state(s) observed at RHIC has just begun. In spite of the impressive advances that have been made in the last three years *****there are still many issues to be understood in detail, such as the differences in the high p******T****** suppression of baryons and mesons and the quantitative energy and rapidity dependence of the final and initial state high p******T****** suppression. Undoubtedly future measurements will shed new light on these and many other questions.***** **

- PANIC

- 29-Oct-05

## PHENIX White Paper

**In conclusion, there is compelling experimental evidence that heavy-ion collisions at RHIC produce a state of matter characterized by very high energy densities, density of unscreened color charges ten times that of a nucleon, large cross sections for the interaction between strongly interacting particles, strong collective flow, and early thermalization. Measurements indicate that this matter modifies jet fragmentation and has opacity that is too large to be explained by any known hadronic processes. This state of matter is not describable in terms of ordinary color-neutral hadrons, because there is no known self-consistent theory of matter composed of ordinary hadrons at th  measured densities. The most economical description is in terms of the underlying quark and gluon degrees of freedom. Models taking this approach have scored impressive successes in explaining many, but not all, of the striking features measured to date. *****There is not yet irrefutable evidence that this state of matter is characterized by quark deconfinement or chiral symmetry restoration, which would be a direct indication of quark-gluon plasma formation. The anticipated program of additional incisive experimental measurements combined with continued refinement of the theoretical description is needed to achieve a complete understanding of the state of matter created at RHIC.***

- PANIC

- 29-Oct-05

## PHOBOS White Paper

**One of the most important discoveries at RHIC is the evidence that, in central Au+Au collisions at ultra-relativistic energies, an extremely high energy den- sity system is created, whose description in terms of simple hadronic degrees of freedom is inappropriate. Furthermore, the constituents of this system experience a significant level of interaction with each other inside the medium. These conclusions are based on very general and, to a large extent, model independent arguments. It is not claimed that the observed phenomena are unique to RHIC energies. *****Nor is it claimed that there is direct evidence in the data analyzed so far for color deconfinement or chiral symmetry restoration.***

- PANIC

- 29-Oct-05

## STAR White Paper

**The properties already delineated, with seminal contributions from STAR, point toward a dense, opaque, non-viscous, pre-hadronic liquid state that was not anticipated before RHIC. *****Determining whether the quarks and gluons in this matter reach thermal equilibrium with one another before they become confined within hadrons, and eventually whether chiral symmetry is restored, are two among many profound questions one may ask. Further elaboration of the properties of this matter, with eyes open to new unanticipated features, remains a vital research mission,***** independent of the answer that nature eventually divulges to the more limited question that has been the focus of this document.**

- PANIC

- 29-Oct-05

## Perfect Fluid?

**We sailed very close to the wind with the Tampa press release:**
**“****RHIC Scientists Serve up ‘Perfect Liquid’ ”**
**“****While RHIC scientists don’t have a direct measure of viscosity, they can infer from the flow pattern that, qualitatively, the viscosity is very low, approaching the quantum mechanical limit. ”**
**REALLY ?**

**Absence of evidence is not evidence of absence (C. Sagan?)**
**Details that could throw doubt on your interpretation must be given  (R. Feynman)**

- PANIC

- 29-Oct-05

## Physics Questions to be addressed by the Working Groups 

**What is the nature of the phase transition between nuclear matter and quark matter? (How does this type of matter return to its usual forms observed in our detectors?) How does hadronization work? Is there evidence for deconfinement? **
**How does the clearly evident thermodynamic character of a high energy heavy ion collision evolve from the zero entropy initial state? How does the collision thermalize so quickly? **
**What are the properties of strongly coupled quark gluon plasma? Transport properties? Medium properties: Resonant states? Collision probability? Screening length? **
**Is chiral symmetry restored? When in the collision and what are the effects? **
**What can non-equilibrium field theory tell us about: Initial state? Is there a color glass condensate? Thermalization? Medium properties? **
**What is the structure and dynamics inside the proton? What is the spin structure of the nucleon? Is parity violation important? **
**Are there exotic hadrons that can be studied at RHIC II? **

- PANIC

- 29-Oct-05

## Strategy Leading to Answers

- Continue analysis of precision probes from existing (large) data sets.
- Invest in near-term detector upgrade projects for PHENIX and STAR to take full advantage of the existing accelerator capabilities.
- Invest in accelerator and detector R&D, in preparation for RHIC II, to enable crucial measurements of this new form of dense matter using rare probes
- Construct Electron Beam Ion Source as quickly as possible to improve reliability and increase capabilities of the heavy-ion injection system and to realize projected reduction in RHIC operating costs.

- PANIC

- 29-Oct-05

*Continue analysis of precision probes*

- PANIC

- 29-Oct-05

## Precision Probes

**This one figure encodes ****rigorous control of systematics**
**in four different measurements over many orders of magnitude**

**=**

**=**

- PANIC

- 29-Oct-05

## Continued Analysis of Precision Probes?

**What’s left?**
**For starters:**
**True thermal photons:**
**Elliptic flow of photons**
**“**The observation of such an asymmetry would be a signature for the presence of a quark gluon plasma and would establish the importance of jet-plasma interactions as a source of electromagnetic radiation.**”****(S.Turbide, C. Gale, R.J. Fries, hep-ph/0508201)**
**Photon+jet**
******+jet ****coincidences****~ 1nb / GeV at****E******** ~ 15 GeV**
**Presently:****~0.25 nb****-1****recorded**

**✔**

**✔****?**

**X**

**✔ ******** ****Accessible in RHIC I**

- PANIC

- 29-Oct-05

- Invest in near-term detector upgrade projects

- PANIC

- 29-Oct-05

## Near-Term upgrades

**STAR TOF:**
**underway**
**16 institutions**
**PHENIX HBD:**
**underway**
**8 institutions**
**Vertex ****detectors**
**PHENIX partially****underway**
**STAR proposal ****in preparation**

**    ****Tracking flavor in jet tomography**

**    ****Thermal radiation, **
**chiral symmetry restoration**

**    ****Heavy quark flow**

- PANIC

- 29-Oct-05

## STAR Upgrades

**Full Barrel Time-of-Flight system**

**DAQ and TPC-FEE upgrade**

**Forward Meson Spectrometer**

**Integrated Tracking Upgrade**

**HFT pixel detector**

**Barrel silicon tracker **

**Forward silicon tracker**

**Forward triple-GEM EEMC tracker**

**STAR Upgrades**

- TPC

**Magnet**

**Barrel EMC**
**End Cap EMC**

**Beam-Beam Counters**

**Forward ********o**** Det.**

**Photon Mult. Det.**

**FTPC’s**

**VPD’s**
**(TOF Start)**

**ZDC**

- PANIC

- 29-Oct-05

## PHENIX Upgrades

**PHENIX Upgrades**

- PANIC

- 29-Oct-05

##  coverage                 2

**-3              -2             -1                 0                1               2               3    rapidity**

**Prompt photons:     central EMCal          |y| < 0.35      forward NCC      0.9 < y < 3.0 (-3.0 < y <-0.9) **
**Jet (charged):          central TPC + VTX   |********| < 1.2       forward silicon  1.2 < ******** < 2.7 (-2.7 < ********<-1.2) **
**Jet (energy):****	****	****	****	**** forward NCC      0.9 < ******** < 3.5**** ****(-3.5 < ********< -0.9)**** **

****** ****coverage                 2******

**Large acceptance for ********-jet tomography: **
**	**** ****expect measurements out to  E****jet**** > 20 GeV**
**Large acceptance for flavor tagging **
**Limited acceptance for p – meson separation**

**4 GeV**

**10GeV**

- PANIC

- 29-Oct-05

- Invest in accelerator and detector *R&D*, in preparation for *RHIC* II

- PANIC

- 29-Oct-05

## Physics Beyond the Reach of Current Facility   

**High T QCD (AA, pA, and pp): **
**Electromagnetic radiation (e****+****e********pair continuum)**
**Heavy flavor (c- and ****b-production****)**
**Jet tomography (jet-jet ****and ********-jet****) **
**Quarkonium**** ****(****J/********, ********’ , ********c**** and ********(1s),********(2s),********(3s)****)**
**Spin structure of the nucleon:**
**Quark spin structure ********q/q (W-production)**
**Gluon spin structure ********G/G (heavy flavor and ********-jet correlations)**
**Low x phenomena **
**gluon saturation in nuclei ****(particle production at forward rapidity)**

**Provide key measurements so far inaccessible at RHIC in three broad areas:**

**All measurements require upgrades of detectors and/or RHIC luminosity**

- PANIC

- 29-Oct-05

## Jet Tomography

**Jet Tomography**

**Even with detailed****jet tomography****available to date:**
**There remain ****substantial ****uncertainties in extracting****quantities as fundamental as**
**(U. Wiedemann, this conference)**** **
**Note that within these uncertainties,**
**Need a different (intrinsic) ****scale ********  heavy flavor**

- R. Baier, NPA 715 (2003) 209** **

- 4.0 < pTtrig < 6.0 GeV/cz

- 2.0 < pTassoc < pT(trig) GeV/c

- 0.15 < pTassoc < 4.0 GeV/c

- PANIC

- 29-Oct-05

## Heavy Flavor

**All(?) length scales in the QCD plasma are “degenerate”:**
**i.e. they all are proportional to 1/T ****(times various powers of g)**
**Fix this by introducing ****heavy flavor:**
**M****c**** ~ 1.3 GeV**
**M****b**** ~ 5.0 GeV**
**     ****to introduce new scales**
**1 / M****c**** ~ 0.15 fm**
**1 / M****b**** ~ 0.04 fm**
**Flavor tagged jets**
**     ****Bohr radii (onium):**
**J/******** ~ 0.29 fm**
******     ****~ 0.13 fm **
**“****Onium” spectroscopy**
***Completing these measurements require RHIC II luminosities***

- PANIC

- 29-Oct-05

## Current and Projected Status

**Run-2 ****data set barely  ****discriminates**** between *****enhanced****** *****and**** *****suppressed *****J/******** production**
**Run-4 analysis ****distinguishes ****between *****‘ordinary’***** and *****‘anamolous’***** ****suppression**
**Full sensitivity to screening physics using J/******** and ******** ’ will require *****much greater***** integrated luminosities, such as those provided by x10 luminosity upgrade to RHIC **

**Run 2**
**Run 4**
**RHIC II**

**Coalescence Model**

- PANIC

- 29-Oct-05

## Heavy Flavor Tagged Jets in STAR

**Complete measurements possible only with ****RHIC II + Detector upgrades**
***These measurements require RHIC II luminosities***

- Ramona Vogt, hep-ph/0111271

- p+p

-   **p****T ****~ 15 GeV/c:   ********(p+p)  ~5 x 10****-4**** ********b/Gev ****     ******** ********(Au+Au)  ~20********b/Gev centrally produced**
**  ****But *****5 years***** of RHIC I Au+Au (10 nb****-1****) needed ******** 200K b-bar pairs**

- PANIC

- 29-Oct-05

## Spin

**The entire spin program is luminosity-starved:**
**Original RHIC Spin proposal:**
**320 pb****-1**** , 70% polarization at 200 GeV (A****LL**** for direct photons)**
**800 pb****-1****, 70% polarization at 500 GeV (A****L**** for W’s)**
**To date:**
**Polarization ~50%**
**Integrated luminosity ~5 pb****-1**** **
**Impressive achievements given the limited time for machine development during the polarized proton running periods**
**Even if  RHIC II did not improve p+p luminosity, it would allow more efficient progress through the heavy ion program.**
**Fortunately, gains are also expected from e-cooling****(1.5  ******** 5.0) x 10****32**** cm****-2**** s****-1**

- PANIC

- 29-Oct-05

## p+A

**Another luminosity-starved  program:**
**Run-3: 2.7 nb****-1**** d+Au**
**Provides clear J/******** signals**
**With modest  discrimination power ****to test shadowing models**
**A clear indication of the much greater x****2**** range made ****available by RHIC**
**A clear need for**
**20 nb****-1****       : shadowing**
**200 nb****-1****     : ********’, Drell-Yan**
**>200 nb****-1****   : ********’s**
***Measurements beyond  ~*****20 nb****-1 *****require RHIC II luminosities***

- PANIC

- 29-Oct-05

## From RHIC I to RHIC II

**Design Luminosity for Au+Au:**
**L****D**** = 2 x 10****26**** cm****2**** s****-1**** **
**Integrated (delivered) luminosity per week ~ 0.06 nb****-1**
**Run-4 performance establishes 2 x ****L****D **** in hand ****(for Au+Au)**
**Suggests “ultimate” RHIC I Au+Au run delivers 2-4 nb****-1**
**However**
**Many crucial characterization measurements ****require well in excess of 10 nb****-1**
**Full utilization of the facility requires that such samples *****and*****  comparable**
**p+p baseline**
**d+Au control**
**     ****be acquired as rapidly as efficiently as possible**
**Both “A” and “B” argue for RHIC II ******** 40 x ****L****D**

- PANIC

- 29-Oct-05

## RHIC Upgrades Timeline

**RHIC Upgrades Timeline**

**~ 2008 (LHC start)**

_**RHIC baseline program**_
**  ****Au-Au ~ 250 ********b****-1 ****at 200 GeV**
**  ****Species scan at 200 GeV**
**  ****Au-Au energy scan**
**  ****Polarized protons ******** 150 nb****-1**

_**Full utilization of RHIC opportunities:**_** **
**Studies of sQGP with rare probes:  **
**       ****jet tomography, open flavor,   **
**       ****J/********, ********’, ********c, ********(1s), ********(2s), ********(3s)**
**Complete spin physics program**
**Exploit p-A physics**

_**Extended program with 1**__**st**__** detector upgrades:**_
**Au-Au ~ **
**   ****1.5 nb****-1 ****at 200 GeV**
**Polarized p 500 GeV**
**Start p-A program**

**RHIC operation**

**Near term upgrades **
**PHENIX: HBD, VTX **
**STAR:  DAQ, FMS, TOF**

**Longer term detector upgrades **

**RHIC upgrades**

**Near term: Base line**

** ****Longer term:****  **

**Medium term:**

**~ 2010-2012 **

**eRHIC**

- PANIC

- 29-Oct-05

- Construct Electron Beam Ion Source as quickly as possible

- PANIC

- 29-Oct-05

## EBIS Status

**EBIS Electron Beam Ion Source**
**Replaces tandems (thereby avoiding ~$9 M reliability investment)**
**Extends range of species (polarized 3He, noble elements, uranium)**
**Approved for construction**
**CD-1 obtained**
**$19.4M cost**
**($4.5M NASA)**
**3.5 yr schedule**
**FY06-09**
**New Physics!**
**      ****(Next slide)**

- PANIC

- 29-Oct-05

## U+U collisions

**Static deformation provides a way to vary the ‘other’ control parameter (baryon chemical potential)**

- PANIC

- 29-Oct-05

## Speaking of High Baryon Density

**There is *****considerable *****uncertainty in the location of the QCD critical point**
**RHIC II  might  make major advances on the “other” QCD front:**
**U+U beams**
**High luminosity (?)**
**Comprehensive detectors**
**Superb control of systematics when changing √s**

**Needs input RSN (W. Fischer)**
**A feature of colliders****(an anti-feature of fixed target)**

- PANIC

- 29-Oct-05

## Not Covered Here

**Spin prospects- especially as improved by**
**Detector upgrades**
**Increased luminosity **
**     ****(S. Vigdor)**
**Truly forward physics (see F. Videbaek, Nov-04) **** **
**pA/dA physics (C. Gagliardi)**** **
**Exotica**
**Strong CP violation**
**New physics via parity violating spin processes (e.g., A****L****PV**** )**
**Ultra-peripheral collisions**
**Relation to LHC (A. Frawley)**

- PANIC

- 29-Oct-05

## How Do We Get There?

**My personal perspective (prejudices):**
**“****QCDLab” is too good of a descriptor to give up:**
**We should not surrender it to other facilities that lack**
**a dedicated program**
**any of the QCDLab components (polarized protons, A+A, p+A, e+A)**
**The vision must be a comprehensive one that includes**
**Continued enhancements to existing detectors/collaborations**
**Continued improvements on RHIC luminosity**
**Steady progress towards eRHIC**
**I do not believe that this picture, taking into account existing budgetary constraints, can accommodate a major new detector for RHIC.**
**I do believe that many of the appealing features of R2D can and should be considered as part of the eRHIC detector**

- PANIC

- 29-Oct-05

## Summary

**Continued program based on “major discovery potential”.**
**Already established, more to come**
**Scientific merit **
**Evident in unparalleled quantitative precision in complex environment(s)**
**Connection to other fields and interest outside our field**
**Established ties to gauge/string correspondence**
**Establishing ties to ‘real’ plasma field**
**Re-establishing(?) ties to early universe**
** ****Unique opportunity (science lost without this)**
**To finish what we have started**
**RHIC spin**
**e-RHIC**
**Societal impact**
**Broad international community**
**Excellent PhD production and post-doc development**
**Excellent record of job creation**
**Theory: 11 tenured (!), 4 untenured, 3 new appointments**
**Experiment: 3 untenured, 1 new appointment**

- PANIC

- 29-Oct-05