The scalar-isoscalar spectral function of strong matter in a large N approximation

Details The scalar-isoscalar spectral function of strong matter in a large N approximation The scalar-isoscalar spectral function of strong matter in a large N approximation

2002-12-20

arxiv.org/abs/hep-ph/0212310v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, poster presented at SEWM2002, Heidelberg, October 2002

Scientific paper

The enhancement of the scalar-isoscalar spectral function near the two-pion threshold is studied in the framework of an effective linear $\sigma$ model, using a large N approximation in the number of the Goldstone bosons. The effect is rather insensitive to the detailed T=0 characteristics of the $\sigma$ pole, it is accounted by a pole moving with increasing $T$ along the real axis of the second Riemann sheet towards the threshold location from below.

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