QCD at non-zero T and r

Nuclear matter at high temperatures and/or densities exhibits:



• Color deconfinement: as(T) ? 0
• Chiral symmetry restoration: mq (T,r) ? 0

New state of matter

???

V = s r

(multi-gluon

exchange)

V ~ -aeff/ r

(1-gluon

exchange)

QCD color

potential:

QCD

vacuum:

Bag

pressure:

B1/4~0.2 GeV

T= 0

V ~ s r [1-exp(-m r)/m r] , m = rD-1

High T

High T and r

(String tension

s =1GeV/fm)

Quark

masses:

u/d quarks:

s quark :

“empty” vacuum

(NJL model)

q&g can roam freely

over large volume

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