Work

Scale-anomaly-induced binding pressure in hadrons

Year: 2025

Type: article

Abstract: The effect of the QCD scale anomaly on the internal pressure distribution of hadrons is studied based on the trace-traceless decomposition of the energy-momentum tensor. Using recent model-independent results of gravitational form factors as input, the pressure distributions of both pions and nucleons are analyzed in the instant form and the light-front form. It is found that, in all cases, the scale anomaly dominantly generates the negative binding pressure. This result suggests that the phenomenon is a universal feature, independent of models, types of hadrons, and the choice of form.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2025.139872

Authors: Daisuke Fujii, Mitsuru Tanaka

Institutions: Japan Atomic Energy Agency, Advanced Science Research Center, The University of Osaka, Nagoya University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: Japan Society for the Promotion of Science, Japan Science and Technology Agency

Awards: G3660632507, New frontier of QCD and hadron physics pioneered by stress distribution inside hadrons extracted from gravitational form factors