Scalar spectral functions from the spectral functional renormalization group

被引：0

作者：

Horak, Jan ^{[1
]}

Ihssen, Friederike ^{[1
]}

Pawlowski, Jan M. ^{[1
,2
]}

Wessely, Jonas ^{[1
]}

Wink, Nicolas ^{[3
]}

机构：

[1] Heidelberg Univ, Inst Theoret Phys, Philosophenweg 16, D-69120 Heidelberg, Germany

[2] ExtreMe Matter Inst EMMI, GSI, Planckstr 1, D-64291 Darmstadt, Germany

[3] Tech Univ Darmstadt, Inst Kernphys Theoriezentrum, D-64289 Darmstadt, Germany

来源：

PHYSICAL REVIEW D | 2024年 / 110卷 / 05期

关键词：

CALLAN-SYMANZIK EQUATION; STATES;

D O I：

10.1103/PhysRevD.110.056009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：23

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