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.
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页数：23
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