Scalar spectral functions from the spectral functional renormalization group-Reference-Cited by-同舟云学术

Scalar spectral functions from the spectral functional renormalization group

Published:2024-09-05 Issue:5 Volume:110 Page:
ISSN:2470-0010
Container-title:Physical Review D
language:en
Short-container-title:Phys. Rev. D

Author:

Horak Jan¹,Ihssen Friederike¹^ORCID,Pawlowski Jan M.¹²³^ORCID,Wessely Jonas¹^ORCID,Wink Nicolas⁴^ORCID

Affiliation:

1. Universität Heidelberg

2. ExtreMe Matter Institute EMMI

3. GSI

4. Technische Universität Darmstadt

Abstract

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.

Published by the American Physical Society

2024

Funder

Deutsche Forschungsgemeinschaft

Studienstiftung des Deutschen Volkes

DFG Collaborative Research Centre

Collaborative Research Centre SFB

Hessian collaborative research cluster ELEMENTS

Publisher

American Physical Society (APS)

Link

http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.110.056009/fulltext

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