Energy momentum tensor on and off the light cone: exposition with scalar Yukawa theory

Journal Article · Mon Jul 01 00:00:00 UTC 2024 · Journal of High Energy Physics (Online)

DOI: https://doi.org/10.1007/jhep07(2024)095 · OSTI ID:2576083

Cao, Xianghui ; Xu, Siqi ; Li, Yang ; Chen, Guangyao ; Zhao, Xingbo ; Karmanov, V.; Vary, J.

Abstract We compute the gravitational form factorsA_i,D_iand$$$$ {\overline{c}}_i $$$$ ${\overline{c}}_i$ of the scalar Yukawa theory using both the light-cone and covariant perturbation theory at the one-loop level. The light-cone formalism provides a potential approach to access these form factors beyond the perturbative regime. However, unlike the covariant formulation, the Poincaré symmetry on the light cone is not manifest. In this work, we use perturbation theory as a benchmark to extract the gravitational form factors from the light-front energy-momentum tensor. By comparing results on and off the light cone, we identifyT⁺⁺,T^+a,T⁺⁻,T¹²as the “good currents” that are properly renormalized and can be used to extract the gravitational form factors.

• Research Organization: Iowa State Univ., Ames, IA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: SC0023692
• OSTI ID: 2576083
• Journal Information: Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 7 Vol. 2024; ISSN 1029-8479
• Publisher: Springer NatureCopyright Statement
• Country of Publication: United States
• Language: EN