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Helmholtz-Zentrum Dresden-Rossendorf Extreme Matter in the Universe

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Presentation on theme: "Helmholtz-Zentrum Dresden-Rossendorf Extreme Matter in the Universe"— Presentation transcript:

1 Helmholtz-Zentrum Dresden-Rossendorf Extreme Matter in the Universe
B. Kämpfer Indian Summer School 2011 Extreme Matter in the Universe (part 3)

2 LHC at CERN: searching Higgs, SUSY, the unknown
SM: masses of quarks & part of leptons (e.g., e-) P. Higgs 1964

3 Mystery of Mass

4 LHC at CERN: investigating the quark-gluon plasma

5 Rel. Heavy-Ion Colls.: RHIC & LHC
hydro applies: Frankfurt HIC group

6 Thermal Model at Work chemical freeze-out densities  ratios
adjust to data Andronic et al

7 Chemical Freeze-Out Systematics
PBM, Stachel,

8 Particles vs. Antiparticles
post- and pre-dictions Andronic et al

9 Blast Wave Fits kinetic freeze-out chem. f.o. fit of pT spectra
by T and v ALICE BK 1996

10 Fluid Dynamics for urHICs
t present day standard tool: 3. kinetics (transport model) 2. hydrodynamics 1. kinetics (transport model) mid rapidity hydro: hadron gas hadronization chemical f.o. weak decays preequilibrium hydro: sQGP first contact kinetic f.o. x t free stream ? fluid free stream

11 Milne Coordinates Bjorken flow: Bjorken symmetry: Gubser flow:

12 Bjorken Flow  Milne cordinates Bjorken symmetry
EoS in conformal limit: e = 3p   entropy in comoving volume = conserved for every EoS w/o dissipation mystery:

13 Longitudinal Pressure Gradient
v = th y initial conds: Bjorken flow Bozek, PRC 2009 init. non-Bjorken flow: different evolution it is hard to modify Bjorken‘s flow once it is there  origin of Bjorken flow? Kajantie, Eskola, Russkanen, EPJC 1998

14 Soft and Hard Probes ALICE, PLB 2011 jets

15 Hard Probes: Medium Modifications
energy loss RHIC: disappearence of away-side jet

16 Transverse Flow soft probes central semi-central peripheral no p
momentum space configuration space

17 hydro  Cooper-Frye  momentum distrib.  v2(p_perp)
STAR at RHIC Bluhm et al., PRC 2007 hydro  Cooper-Frye  momentum distrib.  v2(p_perp)

18 B. Schenke

19 U.Heinz, Crete 2011

20 U.Heinz, Crete 2011

21 Viscous Fluid Dynamics
water is good fluid, honey not, oil partially

22 bulk viscosity shear viscosity  rel. Navier-Stokes eqs.





27 Viscosities from Calculations
Bluhm, BK, Redlich, PRC 2011

28 A Unified Description: AdS/CFT
2 1 Chesler, Yaffe, PRL 2011 1‘ 3 2‘ time AdS/CFT: 1. solve 5d Einstein vacuum eqs. (with symmetries) with negative cosmological constant 2. obtain 4d energy-momentum tensor from holographic renormalization (boundary theory)

29 What remains for CBM at FAIR?
energy frontier SIS18 Bevalac AGS SPS RHIC LHC SIS100/300 intensity frontier: rare probes (charm, photons, dileptons) T = mu



32 PBM, Stachel,

33 physics case technical design simulations & feasibility

34 Key Issues for CBM in-depth study of onset of deconfinement
EoS & transport coefficients medium modifications hadrons „never studied“ at SIS100/300 energies: charm: hidden & open, charm baryons (created early  probe dense stage) dileptons & photons: penetrating probes (monitoring the dense stage, looking into fireball) fluctuations: higher moments sensitive to proxy of CEP correlations: size (temporal & spatial) measurements

35 Strongly Coupled Systems
transport peak  quasi-particles AdS/CFT weak coupling strong coupling

36 Summary Cosmic Confinement/Hadronization: no imprints
nucleons as remainder due small excess (= accident?) Nucleosynthesis: sensitive test of cosmic dynamics abundancies of light elements is specific imprint Neutron Stars: quark cores seem possible (but hard to verify; need fine tuning of cold EoS) RHIC & LHC: sQGP seems w/o doubts, EoS from lattice QCD, sQGP = most perfect fluid: viscosities are small, energy scan at RHIC gives orientation (no rare probes) HADES&CBM at SIS100/300: exploration of phase diagram, rare & penetrating probes, closer link to hadron physics

37 Probing the Fireball‘s Interior
PRL 2007 thermal radiation: Gallmeister et al. PLB 2000 Rapp-Shuryak PLB 2000

38 DLS Puzzle Solved by Bremsstrahlung?
Nikola Tesla 1888 Barz et al Bratkovskaya, Cassing NPA 2008 C(1 AGeV) + C DLS: PRL 1997 HADES: PLB 2008 M [GeV] 1997: bremsstrahlung ... contribution was found to be small 2007: DLS puzzle... may be solved when incorporating a stronger bremsstr. contribution Aichelin et al. 2008: w/ bremsstrahlung Santini et al. 2008: w/o bremsstrahlung Schmidt et al. 2009: w/o bremsstrahlung

39 CERES Pb(158 AGeV)+Au <T> = 170 MeV cocktail thermal rad.
DY thermal rad. cocktail t pre-equ. fireball freeze-out

40 NA60: Di-Muons LMR IMR NA60 broadening no shift NA60 0907.3935

41 RHIC real photons cocktail confirmed by pp Quarks & Gluons PHENIX
Drees PHENIX real photons Quarks & Gluons Hadrons cocktail confirmed by pp PHENIX PHENIX

42 Dielectrons PHENIX data

43 Photons PHENIX data

44 Fluid Dynamics from Gravity
FG coordinates Bhattacharyya, Hubeny, Rangamani ... JHEP 2008 bulk near z = 0, asymp. AdS metric & black brane strong coupling regime: universal sector in long-wavelength solutions, isotropization  assume as relevant d.o.f.

45 epsilon expansion: z expansion equivalent?
iterative solutions of Einstein eqs.  constitutive eqs.: extrinsic curvature on r = const from

46 The Janik Route Bjorken flow + symmetry, Milne coordinates e
Janik, Lecture Notes Phys. 2011 Bjorken flow + symmetry, Milne coordinates e

47 Get e(tau) from AdS/CFT
FG coordinates: 1 boundary theory: z = 0 z expansion (indices suppressed): ... iterative solution for n > 4 Einstein eqs. Skenderis et al., 2000 Definition: Kretschmann

48 requirement: K = regular (no singularities in the bulk)  values of
Large tau: requirement: K = regular (no singularities in the bulk)  values of the only scale shear viscosity = Gyulassy, Danilewicz PRD 1985 numbers Small tau: Einstein eqs.  constraints for A, B, C  allowed init. conds. anisotropy measure Beuf et al., JHEP 2009

49 1st-order hydro stage: q = 0  F/w = 2/3
Heller, Janik, Witaszczyk 2011 1st-order hydro stage: q = 0  F/w = 2/3

50 Comparison of with Frankfurt
third-order rel. diss. hydro, extension of Israel-Stewart El, Xu, Greiner, PRC 2010 Denicol, Koide, Rischke, PRL 2010 shear tensor: for Bjorken flow & symm. Boltzmann m = 0 transient dynamics looks as gradient expansion

51 start from equilibrium:
start from off-equilibrium:


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