Speaker
Daisuke Fujii
(Japan Atomic Energy Agency)
Description
In this study, we investigate the influence of the QCD scale anomaly on the internal pressure distributions of the pion and nucleon, based on the trace-traceless decomposition of the energy-momentum tensor. We use recently reported model-independent results for the gravitational form factors, together with our own calculations within a top-down holographic QCD approach, to evaluate the pressure distributions of the pion and nucleon in both the instant form and the light-front form. Our analysis shows that, in all cases, the scale anomaly predominantly generates negative confining pressure. This finding suggests that the phenomenon is a universal feature, independent of the type of hadron and the choice of form used in the analysis.
Author
Daisuke Fujii
(Japan Atomic Energy Agency)
Co-authors
Dr
Akihiro Iwanaka
(Yukawa Institute for Theoretical Physics, Kyoto University)
Mitsuru Tanaka
(Nagoya University)