Strong Correlations in Hot/Dense QCD
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Transcript of Strong Correlations in Hot/Dense QCD
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Strong Correlations in Hot/Dense QCD T. Hatsuda(Univ. Tokyo)
Present : Two major experimentsto probe the early Universe
WMAP (2001-)
RHIC (2000- ) Future (2007-): LHC (CERN) & Planck (ESA)
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WMAP data(3x105 years)
Inflation
Present (13.7 x 109 years)
Hot Era
Big Bang
CGC
QGP
RHIC data
Little Bang
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Landau’s view on High-Energy Hadron Collisions (1953-1955)
Landau’s view on High-Energy Hadron Collisions (1953-1955)
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Expansion
Freezeout (T = 1.95 K neutrino)
T = 2.73 K photon
Tchem = 170 MeV
Ttherm = 120 MeV
Observables CMB & anisotropy
(CνB, CGB & anisotropy)
Collective flow & anisotropy
Jets, leptons, photons
Parameters to be determined
8~10 cosmological parameters
・ Initial density fluctuation
・ Cosmological const. Λ etc
QGP parameters
・ Initial energy density
・ Equation of state etc
Big Bang Mini Bang
Initial state Inflation ? (10-35 sec) Color glass ? (10-1 fm)
Thermalization Inflaton decay ? decoherence of CGC?
Evolution Code CMBFAST 3D-hydro. code
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[1] QCD Phase Structure -- similarity to High Tc superconductivity – various critical points
[2] Dynamics of QCD Phase Transition
-- climbing the Hagedorn slope -- lattice thermodynamics
[3] Strongly Correlated QCD Plasma ?
-- plasma viscosity -- heavy flavor as a plasma probe
[4] Summary
ContentsContents
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SB
CSC
QGP
T
B
QCD Phase Structure
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Origin of various phasesOrigin of various phases
Asymptotic freedom+ Debye screening deconfinement
Collins & Perry, Phys.Rev.Lett. 34 (‘75)
quark-anti-quark pairing Chiral instability
Nambu & Jona-Lasinio, Phys.Rev. 122 (‘61)
T
SB CSC
QGP
B
strong residual int. pre-formed pairs
Hatsuda & Kunihiro, Phys. Rev. Lett. 55 (‘85) DeTar, Phys.Rev. D32 (‘85)
Asakawa & Yazaki, Nucl. Phys. A504 (’89)
Critical point
quark-quark pairing Cooper instability
Bailin & Love, Phys.Rep.107 (‘84)
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SB CSC
QGP
Similarity with high Tc superconductivitySimilarity with high Tc superconductivity
1. Competition of different orders2. Strong coupling pre-formed pairs in Tc < T < T* ? decoherence at Tc
pair breaking at T*
Highly undedoped
underdoped
optimallydoped
Bi2Sr2CaCuO8+δ
HTS – BEC/BCS – QCD connection ?• Babaev, PRD (’00)• Abuki, Itakura & Hatsuda, PRD (’02)• Kitazawa, Koide, Kunihiro & Nemoto, PRD (’02)• Chen, Stajic, Tan & Levin, Phys. Rep. (’05)
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New critical point induced by axial anomaly ? New critical point induced by axial anomaly ?
SB
QGP
coexistence
General Ginzburg-Landau analysis based on QCD symmetry:
+ …
New critical point
Yamamoto, Tachibana, Baym & Hatsuda, PRL 97 (’06)
Hadron-quark continuity
Schafer & Wilczek, PRL 82 (’99)
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Dynamics of QCD Phase Transition
SB CSC
QGP
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* QCD in a finite box : V
Climbing up the Hagedorn slope-- micro-canonical view of hot QCD --
Climbing up the Hagedorn slope-- micro-canonical view of hot QCD --
* Z(T,V) = Laplace transform of the level density (E,V)
E
Ejiri & Hatsuda, hep-lat/0509119
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Information of the Phase Transition is encoded in the QCD leverl density (E,V)
Hagedorn (1965)Ejiri & Hatsuda, hep-lat/0509119
s() ∝ ln (E,V) ~
~ T0
~ 3/4
E
I
II
III
= E/ V
s()
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QCD thermodynamics QCD thermodynamics
IBM BlueGene at KEK(March, 2006-) 57.3 Tflops
Quenched QCDFull QCD Monte Carlo integration
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QCD phase transition on the latticeQCD phase transition on the lattice
Critical temperature
Tc = 192(7)(4) MeV Cheng et al., hep-lat/0608013
Critical energy density
c : 2-3 GeV/fm3
~ ( 10-20) nm
Orders
crossover (real world ) 2nd order (u,d) 1st order (u,d,s)
ε/T 4
quark-gluon plasma
T/Tc
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Filled:Nt=4, Open:Nt=6
173±8 MeV
Small mud
Tc in 2-favor lattice QCD Ejiri (’04)
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energy (Ge V)
Running Coupling
kinetic energy at T = 2Tc
~ 1 GeVαs ~ O(1)
Strongly Correlated QGP?
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Plasma viscosity on the lattice
Plasma viscosity on the lattice
243x8 (quenched lattice QCD)Nakamura & Sakai, hep-lat/0510100
T/Tc
/s
Kovtun, Son & Starinets (’04) AdS/CFT
Baym, Monien, Pethick & Ravenhall (’90)Arnold, Moore & Yaffe, (’03)pQCD
viscous fluid R << 1
perfect fluid R >> 1
“ Reynolds number”
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Heavy flavor as a plasma probe Heavy flavor as a plasma probe
Miyamura et al., PRL57 (’86) Matsui & Satz, PLB178 (’86)
Dynamic probeStatic probe
Gluon matter (quenched QCD)Quark-gluon matter (full QCD)
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r
g,u,d
Nf= 2, Wilson sea-quarks, 243x40a= 0.083 fm, L= 2 fm, mp/mr= 0.704
SESAM Coll., Phys.Rev.D71 (2005) 114513
1fm0.5fm 1.5fm
[ V
(r)
- 2m
HL ]
a
Static Probe at T=0 : heavy-quark potential (full QCD)
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g,u,d,s
Dynamic Probe at T=0 : charmonia spectra (full QCD)
MILC Coll., PoS (LAT2005) 203 [hep-lat/0510072]
Nf= 2+1, staggered sea-quarks, 163x48, 203x64, 283x96 a = 0.18, 0.12, 0.086 fm, L= 2.8, 2.4, 2.4 fm
spin ave. 1S energy
Note: connection between spectroscopy and V(r)through 1/mc expansion: Eichten-Feinberg (’79) Brown-Weisberger(’79)
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Free energy of quark + anti-quark (full QCD)Free energy of quark + anti-quark (full QCD)
K. Petrov and RBC-Bielefeld Coll.
163x6, p4Fat3 action, mud/ms=0.1, physical ms
g,u,d,s
r
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Charmonium “wave function” ( quenched QCD)
Charmonium “wave function” ( quenched QCD)
gr
QCD-TARO Coll., Phys. Rev. D63 (’01)
r (
GeV
-1)
2
3
5
4
free
T/Tc=1.53
T/Tc=0.93
t (GeV-1)
0.5fm
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PDG(’06) QCD spectral Function QCD spectral Function
dpAK
xdeJxJpD xpi
),(),(
)0,0(),(),( 3
MEM (Maximum Entropy Method): D A
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dpAK
xdeJxJpD xpi
),(),(
)0,0(),(),( 3
Lattice data
)1/(),( / TeeK
“Laplace” kernelAll the information of hadronic correlations
Spectral function
review: Asakawa, Nakahara & Hatsuda, hep-lat/0011040
1. No parameterization necessary for A2. Unique solution for A3. Error estimate for A possible
MEM (Maximum Entropy Method)MEM (Maximum Entropy Method)
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JP=1/2+
Asakawa, Nakahara & Hatsuda, PRD (’99)
Sasaki, Sasaki & Hatsuda, PLB (’06)
Applications of MEM at T=0 Applications of MEM at T=0
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Charmoniums at finiteT (quenched QCD)Charmoniums at finiteT (quenched QCD)
anisotropic lattice, 323 x (96-32)=4.0, at=0.01 fm, (Ls=1.25fm)Asakawa and Hatsuda, PRL (’04)
J/ c
g
anisotropic lattice, 243 x (160-34)=4.0, at=0.056 fm, (Ls=1.34 fm)Jakovac, Petreczky, Petrov & VelytskyHep-lat/0603005
J/
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quenchedDatta, Karsch, Wissel, Petreczky & Wetzorke, [hep-lat/0409147]
g
Moving J/ at finiteT (quenched QCD)Moving J/ at finiteT (quenched QCD)
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Hatsuda, hep-ph/0509306
Net dissociation rate may even be smaller in full QCD
g,u,d
Aarts, et.al., [hep-lat/0511028]
Nf=2, anisotropic lattice, 83 x (48,32,24,16)=6.0, as=0.2 fm, at=0.033 fm, (Ls=1.6 fm) m/m=0.55
2Tc
1.3Tc
Tc
0.7Tc
2Tc
1.3Tc
Tc
0.7Tc
J/
c
Charmoniums at finiteT (full QCD)Charmoniums at finiteT (full QCD)
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quenched, a = 0.02 fmDatta, Jakovac, Karsch & Petreczky, [hep-lat/0603002]
Bottomoniums at finiteT (quenched QCD)Bottomoniums at finiteT (quenched QCD)
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Asakawa, Nakahara & Hatsuda, [hep-lat/0208059]
mud << ms~Tc << mc < mbA
(ω)
/ω2
mφ(T=0)=1.03 GeV at T/Tc= 1.4ss-channel
Light mesons at finiteT (quenched QCD)Light mesons at finiteT (quenched QCD)
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Pion gas
Resonance gas
Q+G+``extra”plasma
weakly int.q+g plasma
q+g plasma
viscou
s fluid
p
erfect fluid
visco
us flu
id
Chiral dynam
icspQ
CD
Lattice QC
D
A new “paradigm”of hot QCD
A new “paradigm”of hot QCD
SP
SLH
C, R
HIC
0
f
Tc
2Tc
10 Tc3
T
T*~
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SummarySummary
2. Several critical points in (T,μ)-plane ? CP at high T and CP at high μ
3. Progress in spectral analysis on the lattice Heavy and light bound states above Tc
Small viscosity even up to 30 Tc ? Full QCD studies are started
1. Hot QCD is strongly interacting at Tc < T < T* ? Just like high Tc superconductor
BEC regime of systems of atomic fermions
RHIC LATTICE
AdS/CFT HTS/BEC
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(1992-)
SPS (1994-)
(2001-)
RHIC (2000-)
Planck (2007-)
LHC (2007-)
Q.G
.P.
Big Bang
Little Bang
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1. What is quark-gluon plasma
Part I. Basic Concept of Quark-Gluon Plasma:
2. Introduction to QCD 3. Physics of quark-hadron phase transition 4. Field theory at finite temperature 5. Lattice gauge approach to QCD phase transitions 6. Chiral phase transition 7. Hadronic states in hot environment
Part II. QGP in Astrophysics:
8. QGP in the early universe 9. Compact stars
Part III. QGP in Relativistic Heavy Ion Collisions:
10. Introduction to relativistic heavy ion collisions 11. Relativistic hydrodynamics for heavy ion collisions 12. Transport theory for pre-equilibrium process 13. Formation and evolution of QGP 14. Fundamentals of QGP diagnostics 15. Results from CERN-SPS experiments 16. First results from BNL-RHIC 17. Detectors in relativistic heavy ion experiments
(Cambridge Univ. Press, 2005)
http://utkhii.px.tsukuba.ac.jp/cupbook/index.html
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Back up slides
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Scale of each “phase”Scale of each “phase”
cSB CSC
QGP
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T (MeV)
Yukawa regime Hagedorn regime
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Dilute gasPercolationtransition Closely packed
Volume fraction:
Percolation picture
T.H., (’97)
1/3
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Symmetry of each “phase” (case for small mud with ms=∞)Symmetry of each “phase” (case for small mud with ms=∞)
0qq
)1()2()3( BRLC USUSU
)1()]2()2([)3( BRLC USUSUSU
)1(~
)]2()2([)2( CBRLC USUSUSU
0qq
cSB CSC
QGP
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・ Ginzburg-Landau Potential (3-flavor, chiral limit)
Symmetry:
Chiral modes: ~
Diquark modes:
G SU(3)L SU(3)R B# A# SU(3)C
3 3* 0 2/3 1
3 1 2/3 -2/3 3
1 3 2/3 2/3 3
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・ Ginzburg-Landau Potential (3-flavor, chiral limit)
= U(1)A breaking terms =
Yamamoto, Tachibana, Baym & Hatsuda, hep-ph/0605018
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Examples in full lattice QCDExamples in full lattice QCD
Heavy bound states
MILC Coll., hep-lat/0510072
Nf= 2+1, staggered, 163x48, 203x64, 283x96 a = 0.18, 0.12, 0.086 fm L= 2.8, 2.4, 2.4 fm
Mas
s-(s
pin
avar
aged
1s)
[MeV
]
Confining string
R
SESAM Coll., Phys.Rev.D71 (2005) 114513
1fm0.5fm 1.5fm
[ V
(R)
- 2m
HL ]
a
Nf= 2, Wilson, 243x40 a= 0.083 fm L= 2 fm mp/mr= 0.704
R/a
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・ naive perturbation: meaningful only for T>100 GeV ・ resummation may improve the situation
QCD Pressure near TcQCD Pressure near Tc
T=100GeV T=1 GeV T=0.2 GeVQCD Pressure (Nf=4)
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Inter-particledistance
Electric screening
Magneticscreening
1/T
1/gT
1/g2T
QGP for g << 1 ( T >> 100 GeV )QGP for g << 1 ( T >> 100 GeV )
Relativistic plasma :
“Coulomb” coupling parameter :
Debye number :
S. Ichimaru, Rev. Mod. Phys. 54 (’82) 1071
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QCD is non-perturbative even at T = ∞
Non-Abelian magnetic problem Non-Abelian magnetic problem
μ ν
EOS : A. Linde, Phys. Lett. B96 (’80) 289
“Debye” screening :
Kraemmer & Rebhan, Rept.Prog.Phys.67 (’04)351
magnetic screening :
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(m~ g2T)
soft magnetic gluons are always non-perturbative even if g 0 (T ∞)
pertubation theory from O(g6)