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Rho and sigma mesons in unitarized thermal XPT

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Llanes Estrada, Felipe José and Dobado González, Antonio and Gómez Nicola, Ángel and Peláez Sagredo, José Ramón (2003) Rho and sigma mesons in unitarized thermal XPT. In Strong and Electroweak Matter 2002. World Scientific, pp. 307-311. ISBN 981-238-333-6

Official URL: http://dx.doi.org/10.1142/9789812704498_0034




Abstract

We present our recent results for the rho and sigma mesons considered as resonances in pion-pion scattering in a thermal bath. We use chiral perturbation theory to order p(4) for the low energy behaviour, then extend the analysis via the unitarization method of the Inverse Amplitude into the resonance region. The width of the rho broadens about twice the amount required by phase space considerations alone, its mass staying practically constant up to temperatures of order 150 MeV. The sigma meson behaves in accordance to chiral symmetry restoration expectations.


Item Type:Book Section
Additional Information:

International Conference on Strong and Electroweak Matter (5. 2002. Heidelberg, Germany)

Uncontrolled Keywords:Chiral Perturbation-Theory, Finite-Temperature, Pion-Scattering, One-Loop, Mass
Subjects:Sciences > Physics
ID Code:22195
Deposited On:04 Jul 2013 18:02
Last Modified:10 Dec 2018 15:09

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