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arXiv · 0708.2389

Vector and axialvector mesons at nonzero temperature within a gauged linear sigma model

Stefan Strüber·Dirk H. Rischke
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Abstract

We consider vector and axialvector mesons in the framework of a gauged linear sigma model with chiral $U(N_f)_R \times U(N_f)_L$ symmetry. For $N_f=2$, we investigate the behavior of the chiral condensate and the meson masses as a function of temperature by solving a system of coupled Dyson-Schwinger equations derived via the 2PI formalism in double-bubble approximation. We find that the inclusion of vector and axialvector mesons tends to sharpen the chiral transition. Within our approximation scheme, the mass of the $ρ$ meson increases by about 100 MeV towards the chiral transition.

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Stefan Strüber, Dirk H. Rischke. 2007-11-09. Vector and axialvector mesons at nonzero temperature within a gauged linear sigma model. https://doi.org/10.1103/physrevd.77.085004

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