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Thermal hadron production in relativistic nuclear collisions

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arxiv 0901.2909 v2 pith:T5WMDZT5 submitted 2009-01-19 nucl-th

Thermal hadron production in relativistic nuclear collisions

classification nucl-th
keywords collisionsdescriptionhadronproductioncentralconnectiondatadependence
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present the status of the description of hadron production in central nucleus-nucleus collisions within the statistical model . Extending previous studies by inclusion of very high-mass resonances (m>2 GeV), and the up-to-now neglected scalar $\sigma$ meson leads to an improved description of the data. In particular, the hitherto poorly reproduced energy dependence of the K+/pi+ ratio at SPS energies ("the horn") is now well described through the connection to the hadronic mass spectrum and, implicitly, Hagedorn's limiting temperature.

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