Viscous Coefficients of a Hot Pion Gas
The steps essentially involved in the evaluation of transport coefficients in linear response theory using Kubo formulas are to relate the defining retarded correlation function to the corresponding time-ordered one and to evaluate the latter in the conventional perturbation expansion. Here we evalu...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2013/627137 |
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| _version_ | 1832554625214971904 |
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| author | Sourav Sarkar |
| author_facet | Sourav Sarkar |
| author_sort | Sourav Sarkar |
| collection | DOAJ |
| description | The steps essentially involved in the evaluation of transport coefficients in linear response theory using Kubo formulas are to relate the defining retarded correlation function to the corresponding time-ordered one and to evaluate the latter in the conventional perturbation expansion. Here we evaluate the viscosities of a pion gas carrying out both the steps in the real-time formulation. We also obtain the viscous coefficients by solving the relativistic transport equation in the Chapman-Enskog approximation to leading order. An in-medium
π
π
cross-section is used in which spectral modifications are introduced in the propagator of the exchanged
ρ
. |
| format | Article |
| id | doaj-art-341d254a064044e6a7bcda4a0a2584ea |
| institution | Kabale University |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in High Energy Physics |
| spelling | doaj-art-341d254a064044e6a7bcda4a0a2584ea2025-02-03T05:51:03ZengWileyAdvances in High Energy Physics1687-73571687-73652013-01-01201310.1155/2013/627137627137Viscous Coefficients of a Hot Pion GasSourav Sarkar0Theoretical Physics Division, Variable Energy Cyclotron Centre, 1/AF, Bidhannagar, Kolkata 700064, IndiaThe steps essentially involved in the evaluation of transport coefficients in linear response theory using Kubo formulas are to relate the defining retarded correlation function to the corresponding time-ordered one and to evaluate the latter in the conventional perturbation expansion. Here we evaluate the viscosities of a pion gas carrying out both the steps in the real-time formulation. We also obtain the viscous coefficients by solving the relativistic transport equation in the Chapman-Enskog approximation to leading order. An in-medium π π cross-section is used in which spectral modifications are introduced in the propagator of the exchanged ρ .http://dx.doi.org/10.1155/2013/627137 |
| spellingShingle | Sourav Sarkar Viscous Coefficients of a Hot Pion Gas Advances in High Energy Physics |
| title | Viscous Coefficients of a Hot Pion Gas |
| title_full | Viscous Coefficients of a Hot Pion Gas |
| title_fullStr | Viscous Coefficients of a Hot Pion Gas |
| title_full_unstemmed | Viscous Coefficients of a Hot Pion Gas |
| title_short | Viscous Coefficients of a Hot Pion Gas |
| title_sort | viscous coefficients of a hot pion gas |
| url | http://dx.doi.org/10.1155/2013/627137 |
| work_keys_str_mv | AT souravsarkar viscouscoefficientsofahotpiongas |