Visualization of internal forces inside the proton in a classical relativistic model

Abstract

A classical model of a stable particle of finite size is studied. The model parameters can be chosen such that the described particle has the mass and radius of a proton. Using the energy-momentum tensor (EMT), we show how the presence of long-range forces alters some notions taken for granted in short-range systems. We focus our attention on the D-term form factor. The important conclusion is that a more careful definition of the D-term may be required when long-range forces are present.

Comments: 4 pages, 3 figures, presented by M.V. at the 19th International Conference on Hadron Spectroscopy and Structure (HADRON 2021), Mexico City, July 26-31, 2021