English

Recent astrophysical and accelerator based results on the Hadronic Equation of State

Nuclear Theory 2009-11-11 v2

Abstract

In astrophysics as well as in hadron physics progress has recently been made on the determination of the hadronic equation of state (EOS) of compressed matter. The results are contradictory, however. Simulations of heavy ion reactions are now sufficiently robust to predict the stiffness of the (EOS) from (i) the energy dependence of the ratio of K+K^+ from Au+Au and C+C collisions and (ii) the centrality dependence of the K+K^+ multiplicities. The data are best described with a compressibility coefficient at normal nuclear matter density κ\kappa around 200 MeV, a value which is usually called ``soft'' The recent observation of a neutron star with a mass of twice the solar mass is only compatible with theoretical predictions if the EOS is stiff. We review the present situation.

Keywords

Cite

@article{arxiv.nucl-th/0610005,
  title  = {Recent astrophysical and accelerator based results on the Hadronic Equation of State},
  author = {Ch. Hartnack and H. Oeschler and Jörg Aichelin},
  journal= {arXiv preprint arXiv:nucl-th/0610005},
  year   = {2009}
}

Comments

invited talk Strange Quark Matter Conference SQM06 in Los Angeles