Hunting Medium Modifications of the Chiral Condensate B. Kämpfer Research Center Rossendorf/Dresden Technical University Dresden with S. Zschocke, R.

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Presentation transcript:

Hunting Medium Modifications of the Chiral Condensate B. Kämpfer Research Center Rossendorf/Dresden Technical University Dresden with S. Zschocke, R. Thomas, Th. Hilger antennas of QCD vacuum? Brown & Rho (1991): search by HADES... e+ e-

Universal Material Constants of Vacuum symm. break. (spont.), o.p. dil. symm. break. monopoles, instantons, vortices,... D. Leinweber‘s

Expansion not à la Taylor but Wilson: OPE Observables: Wilson coeff. quark & gluon operators

In Medium Dilute Gas Approx.

QCD Sum Rules à la Borel 4-quark condensates (factorization fails)

chiral condensate = genuine chiral condensate

CB-TAPS: Trnka et al. 05 strong density dependence of combined 4-quark conds. PRL 05 also dim-8 contributions norm. moment Thomas/Zschocke/BK

Book Keeping of 4-Quark Condensates vacuum: 5, medium: 12 indep. 4-q conds. w/o color w/ color relations exist between 4-q conds. (not accurately fulfilled in models) nucleon: no inverse

vacuum: 10, medium: 32 indep. 4-q conds.

4-q conds. for nucleon  4-q conds. for V 3 indep. combinations of 4-q conds.

amplifier D in medium: Weise/Morath, Hayashigaki expected pattern: hadron scenario Lutz, Korpa 2005: w/o inel. w/ inel

QCD hadron properties

M_D, vacuum S_0 = 2.45 GeV

basic features (Weise,Morath 2001): w/o change of continuumPole + Continuum Ansatz

= center of gravity of pole ansatz is not appropriate: E [GeV] Spec. Function [GeV^-2] D+ Lutz, Korpa

How to Measure Med.-Mod. of D Mesons? D0 K- pi+ lesson from K-

Fuchs et al.: T > 100 MeV  meson effects Tlab = 25 AGeV Chem. Freeze-Out Cleymans-Redlich-Wheaton param.

Generalis/Broadhurst 84: medium resistent Weise/Morath... 99: tiny in-medium effects

Conclusions 1. CB-TAPS & Borel QSR: strong in-medium change of 4q cond. 4q cond. = new order parameter? 2. N: 4q conds. vs. phenomenlogy Quantify change of QCD vacuum: nB, T dependence of material constants 3. D: antenna of QCD vaccum

CCC: Current-Current Correlator +

Problems: mass sing. vs. mixing