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Introduction to Heavy Ion Physics

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Lattice QCD<br />

• rigorous way of doing calculations in non-perturbative regime of QCD<br />

• discretization on a space-time lattice<br />

ultraviolet (large momentum scale) divergencies can be avoided<br />

• zero baryon density, 3<br />

flavours<br />

• e changes rapidly around T c<br />

• T c = 170 MeV:<br />

3 flavours; (q-q)=0<br />

e c = 0.6 GeV/fm 3<br />

• at T~1.2 T c e settles at about<br />

80% of the Stefan-Boltzmann<br />

value for an ideal gas of q,q g<br />

(e SB )<br />

8-th Summer School on Nuclear <strong>Physics</strong>, 3-12/07/12<br />

9

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