The Sigma Meson and Chiral Transition in Hot and Dense Matter

Details The Sigma Meson and Chiral Transition in Hot and Dense Matter The Sigma Meson and Chiral Transition in Hot and Dense Matter

2001-11-10

arxiv.org/abs/hep-ph/0111121v1

AIP Conf.Proc. 619 (2002) 315-324

Physics

High Energy Physics

High Energy Physics - Phenomenology

Invited talk given at the IXth International Conference on Hadron Spectroscopy- HADRON 2001, Protvino, Aug.25 - Sep.1, 2001

Scientific paper

10.1063/1.1482460

It is pointed out that the hadron spectroscopy should be a study of the structure of the QCD vacuum, low-energy elementary excitations on top of which are hadrons. Concentrating on the dynamical breaking of the chiral symmetry in the QCD vacuum, we emphasize the importance to clarify what is going on with mesons in the $I=J=0$-channel, i.e., the sigma meson channel, because it is connected to the quantum fluctuations of the chiral order parameter. After summarizing the significance of the sigma meson in QCD and low-energy hadron phenomenology, we give a review on some theoretical and experimental effort to try to reveal the possible restoration of chiral symmetry in hot and dense nuclear matter including heavy nuclei.

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