Baryonic Spectral Functions at Finite Temperature - Physics
Baryonic Spectral Functions at Finite Temperature - Physics
Baryonic Spectral Functions at Finite Temperature - Physics
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Hadrons above Tc?<br />
Hadrons above T c<br />
• No a priori reason th<strong>at</strong> no hadrons exist above T c<br />
• QGP looks like strongly interacting system (low viscosity...etc.)<br />
• Definition of <strong>Spectral</strong> Function (SPF)<br />
ρ<br />
J<br />
μν<br />
μ<br />
<br />
( k , k)<br />
e<br />
(2 π )<br />
( )<br />
0 :<br />
−( En−μ<br />
Nn)/<br />
T<br />
0<br />
0 −Pmn<br />
/ T 4<br />
≡<br />
3 ∑<br />
μ ( ) ν ( ) ∓ δ<br />
nm , Z<br />
mn m n<br />
nJ 0 m mJ 0 n(1 e ) ( k−P<br />
)<br />
− ( + ) : Boson(Fermion)<br />
A Heisenberg Oper<strong>at</strong>or with some quantum #<br />
n : Eigenst<strong>at</strong>e with 4-momentum<br />
P = P −P<br />
P<br />
μ<br />
n<br />
mn<br />
• Inform<strong>at</strong>ion on<br />
• Dilepton production<br />
• Photon Production<br />
• J/ψ suppression...etc. :<br />
encoded in SPF<br />
M. Asakawa (Osaka University)
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