Folie 1

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Hunting Medium Modifications of the Chiral
Condensate
B. Kämpfer
Research Center Rossendorf/Dresden
Technical University Dresden
Brown Rho (1991)
search by HADES ...
antennas of QCD vacuum?
with S. Zschocke, R. Thomas, Th. Hilger
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Universal Material Constants of Vacuum
dil. symm. break.
symm. break. (spont.), o.p.
D. Leinwebers
vacuum
monopoles, instantons, vortices, ...
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Expansion not à la Taylor but Wilson OPE
Observables
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In Medium
Dilute Gas Approx.
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QCD Sum Rules à la Borel
4-quark condensates
(factorization fails)
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chiral condensate
genuine chiral condensate
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CB-TAPS Trnka et al. 05
strong density dependence of combined 4-quark
conds.
also dim-8 contributions
norm. moment
Thomas/Zschocke/BK
PRL 05
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Book Keeping of 4-Quark Condensates
vacuum 5, medium 12 indep. 4-q conds.
w/o color
w/ color
nucleon
no inverse
relations exist between 4-q conds. (not
accurately fulfilled in models)
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vacuum 10, medium 32 indep. 4-q conds.
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4-q conds. for nucleon ? 4-q conds. for V
3 indep. combinations of 4-q conds.
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(No Transcript)
12
amplifier
2000
2001
D in medium Weise/Morath, Hayashigaki
expected pattern
hadron scenario Lutz, Korpa 2005
w/o inel.
w/ inel.
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hadron properties
QCD
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M_D, vacuum
S_0 2.45 GeV
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basic features (Weise,Morath 2001)
w/o change of continuum
Pole Continuum Ansatz
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center of gravity of
pole ansatz is not appropriate
D
Lutz, Korpa
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How to Measure Med.-Mod. of D Mesons?
K-
D0
pi
lesson from K-
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Cleymans-Redlich-Wheaton param.
Fuchs et al. T gt 100 MeV ? meson effects
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Generalis/Broadhurst 84
medium resistent
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Conclusions
strong in-medium change of 4q cond.
4q cond. new order parameter?
2. N 4q conds. vs. phenomenlogy
3. D
antenna of QCD vaccum
Quantify change of QCD vacuum nB, T dependence
of material constants
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CCC Current-Current Correlator
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Problems
mass sing. vs. mixing