Scalar spectral functions from the spectral functional renormalization group

• Verfasst von: Horak, Jan [VerfasserIn]
• Verfasst von: Ihssen, Friederike [VerfasserIn]
• Verfasst von: Pawlowski, Jan M. [VerfasserIn]
• Verfasst von: Wessely, Jonas [VerfasserIn]
• Verfasst von: Wink, Nicolas [VerfasserIn]
• Titel: Scalar spectral functions from the spectral functional renormalization group
• Verf.angabe: Jan Horak, Friederike Ihssen, Jan M. Pawlowski, Jonas Wessely, and Nicolas Wink
• E-Jahr: 2024
• Jahr: 5 September, 2024
• Umfang: 23 S.
• Illustrationen: Illustrationen
• Fussnoten: Gesehen am 04.04.2025
• Titel Quelle: Enthalten in: Physical review
• Ort Quelle: Ridge, NY : American Physical Society, 2016
• Jahr Quelle: 2024
• Band/Heft Quelle: 110(2024), 5, Artikel-ID 056009, Seite 1-23
• ISSN Quelle: 2470-0029
• DOI: doi:10.1103/PhysRevD.110.056009
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1921430559

Abstract

We compute spectral functions in a scalar ????4-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.