Hagedorn States and Thermalization

Details Hagedorn States and Thermalization Hagedorn States and Thermalization

2010-08-30

arxiv.org/abs/1008.5075v1

Physics

Nuclear Physics

Nuclear Theory

8 pages, 2 figures, conference proceeding for DM2010, International Workshop on High Density Nuclear Matter, Cape Town, South

Scientific paper

In recent years Hagedorn states have been used to explain the physics close to the critical temperature within a hadron gas. Because of their large decay widths these massive resonances lower $\eta/s$ to near the AdS/CFT limit within the hadron gas phase. A comparison of the Hagedorn model to recent lattice results is made and it is found that for both Tc =176 MeV and Tc=196 MeV, the hadrons can reach chemical equilibrium almost immediately, well before the chemical freeze-out temperatures found in thermal fits for a hadron gas without Hagedorn states. In this paper we also observe the effects of Hagedorn States on the $K^+/\pi^+$ horn seen at AGS, SPS, and RHIC.

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