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Fernández Fraile, Daniel and Gómez Nicola, Ángel (2007) Transport coefficients in chiral perturbation theory. European physical journal A, 314 (4). pp. 848-850. ISSN 1434-6001
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Official URL: http://dx.doi.org/10.1140/epja/i2006-10194-5
Abstract
We present recent results on the calculation of transport coefficients for a pion gas at zero chemical potential in Chiral Perturbation Theory (ChPT) using the Linear Response Theory (LRT). More precisely, we show the behavior of DC conductivity and shear viscosity at low temperatures. To compute transport coefficients, the standard power counting of ChPT has to be modified. The effects derived from imposing unitarity are also analyzed. As physical applications in relativistic heavy-ion collisions, we show the relation of the DC conductivity to soft-photon production and phenomenological effects related to a non-zero shear viscosity. In addition, our values for the shear viscosity to entropy ratio satisfy the KSS bound.
Item Type: | Article |
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Additional Information: | © Società Italiana di Fisica. |
Uncontrolled Keywords: | Matter |
Subjects: | Sciences > Physics > Physics-Mathematical models Sciences > Physics > Mathematical physics |
ID Code: | 30416 |
Deposited On: | 27 May 2015 10:40 |
Last Modified: | 10 Dec 2018 15:09 |
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