Real-time correlation functions in the O(N) model from the functional renormalization group
In the framework of the functional renormalization group we present a simple truncation scheme for the computation of real-time mesonic $$n$$n-point functions, consistent with the derivative expansion of the effective action. Via analytic continuation on the level of the flow equations we perform ca...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
12 March 2014
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| In: |
The European physical journal. C, Particles and fields
Year: 2014, Volume: 74 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-014-2806-6 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-014-2806-6
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| Author Notes: | Kazuhiko Kamikado, Nils Strodthoff, Lorenz von Smekal, Jochen Wambach |
| Summary: | In the framework of the functional renormalization group we present a simple truncation scheme for the computation of real-time mesonic $$n$$n-point functions, consistent with the derivative expansion of the effective action. Via analytic continuation on the level of the flow equations we perform calculations of mesonic spectral functions in the scalar $$O(N)$$O(N)model, which we use as an exploratory example. By investigating the renormalization-scale dependence of the 2-point functions we shed light on the nature of the sigma meson, whose spectral properties are predominantly of dynamical origin. |
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| Item Description: | Gesehen am 05.08.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-014-2806-6 |