Transport properties of a meson gas



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Fernández Fraile, Daniel and Gómez Nicola, Ángel (2007) Transport properties of a meson gas. International journal of modern physics E, 16 (9). pp. 310-313. ISSN 0218-3013

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We present recent results on a systematic method to calculate transport coefficients for a meson gas (in particular, we analyze a pion gas) at low temperatures in the context of Chiral Perturbation Theory. Our method is based on the study of Feymnan diagrams with a power counting which takes into account collisions in the plasma by means of a non-zero particle width. In this way, we obtain results compatible with analysis of Kinetic Theory with just the leading order diagram. We show the behavior with temperature of electrical and thermal conductivities and shear and bulk viscosities, and we discuss the fundamental role played by unitarity. We obtain that bulk viscosity is negligible against shear viscosity near the chiral phase transition. Relations between the different transport coefficients and bounds on them based on different theoretical approximations are also discussed. We also comment on some applications to heavy-ion collisions.

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© World Scientific Publishing Company.
Conferencia. Hadron Physics Workshop (10. 2007. Florianopolis, Brasil).
We would like to thank A. Dobado, F. J. Llanes-Estrada, and J. M. Torres Rincón for useful comments. We also thank the financial support from the Spanish research projects FPA2004-02602, PR27/05-13955-BSCH, FPA2005-02327 and the doctoral fellowship BES-2005-6726 from the MEC-FPI programme

Uncontrolled Keywords:Coefficients
Subjects:Sciences > Physics > Physics-Mathematical models
Sciences > Physics > Mathematical physics
ID Code:30378
Deposited On:27 May 2015 10:06
Last Modified:10 Dec 2018 15:09

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