Scalar spectral functions from the spectral functional renormalization group
We compute spectral functions in a scalar 𝜙4-theory in three spacetime dimensions via the spectral functional renormalization group. This approach allows for the direct, manifestly Lorentz covariant computation of correlation functions in Minkowski spacetime, including a physical on-shell renormaliz...
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| Hauptverfasser: | , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
5 September, 2024
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| In: |
Physical review
Year: 2024, Jahrgang: 110, Heft: 5, Pages: 1-23 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.110.056009 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevD.110.056009 Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.110.056009 
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| Verfasserangaben: | Jan Horak, Friederike Ihssen, Jan M. Pawlowski, Jonas Wessely, and Nicolas Wink |
| Zusammenfassung: | We compute spectral functions in a scalar 𝜙4-theory in three spacetime dimensions via the spectral functional renormalization group. This approach allows for the direct, manifestly Lorentz covariant computation of correlation functions in Minkowski spacetime, including a physical on-shell renormalization. We present numerical results for the spectral functions of the two- and four-point correlation functions for different values of the coupling parameter. These results agree very well with those obtained from another functional real-time approach, the spectral Dyson-Schwinger equation. |
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| Beschreibung: | Gesehen am 04.04.2025 |
| Beschreibung: | Online Resource |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.110.056009 |