Where does the Rho Go? Chirally Symmetric Vector Mesons in the Quark--Gluon Plasma.

Details Where does the Rho Go? Chirally Symmetric Vector Mesons in the Quark--Gluon Plasma. Where does the Rho Go? Chirally Symmetric Vector Mesons in the Quark--Gluon Plasma.

1995-03-14

arxiv.org/abs/hep-ph/9503328v1

Phys.Rev. D52 (1995) 3773-3776

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, ReVTeX.

Scientific paper

10.1103/PhysRevD.52.R3773

If the phase transition of $QCD$ at nonzero temperature is dominated by the (approximate) restoration of chiral symmetry, then the transition might be characterized using a gauged linear sigma model. Assuming that vector meson dominance holds, such sigma models predict that at the temperature of chiral restoration, the pole mass of the thermal $\rho$ meson is greater than that at zero temperature; in the chiral limit and in weak coupling this mass is $\sim 962 \, MeV$. The width of the thermal $\rho-a_1$ peak is estimated to be about $200 - 250 \, MeV$.

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