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arXiv · 2507.23786

Scale-anomaly-induced binding pressure in hadrons

Daisuke Fujii·Mitsuru Tanaka
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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.

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Daisuke Fujii, Mitsuru Tanaka. 2025-07-31. Scale-anomaly-induced binding pressure in hadrons. https://doi.org/10.1016/j.physletb.2025.139872

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