Journal article 843 views
Shear Viscosity in the O(N) Model
,
Jose M. Martinez Resco
Journal of High Energy Physics, Volume: "0402", Issue: 02, Pages: 061 - 061
Swansea University Author:
Gert Aarts
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DOI (Published version): 10.1088/1126-6708/2004/02/061
Abstract
We compute the shear viscosity in the O(N) model at first nontrivial order in the large N expansion. The calculation is organized using the 1/N expansion of the 2PI effective action (2PI-1/N expansion) to next-to-leading order, which leads to an integral equation summing ladder and bubble diagrams....
| Published in: | Journal of High Energy Physics |
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| ISSN: | 1029-8479 |
| Published: |
2004
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa22605 |
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| Abstract: |
We compute the shear viscosity in the O(N) model at first nontrivial order in the large N expansion. The calculation is organized using the 1/N expansion of the 2PI effective action (2PI-1/N expansion) to next-to-leading order, which leads to an integral equation summing ladder and bubble diagrams. We also consider the weakly coupled theory for arbitrary N, using the three-loop expansion of the 2PI effective action. In the limit of weak coupling and vanishing mass, we find an approximate analytical solution of the integral equation. For general coupling and mass, the integral equation is solved numerically using a variational approach. The shear viscosity turns out to be close to the result obtained in the weak-coupling analysis. |
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| Item Description: |
@articleAarts:2004sd, author = "Aarts, Gert and Martinez Resco, Jose M.", title = "Shear viscosity in the O(N) model", journal = "JHEP", volume = "0402", pages = "061", doi = "10.1088/1126-6708/2004/02/061", year = "2004", eprint = "hep-ph/0402192", archivePrefix = "arXiv", primaryClass = "hep-ph", SLACcitation = "%%CITATION = HEP-PH/0402192;%%", |
| College: |
Faculty of Science and Engineering |
| Issue: |
02 |
| Start Page: |
061 |
| End Page: |
061 |