Gravitational $D$-Form Factor: The $\sigma$-Meson as a Dilaton confronted with Lattice Data

Roy Stegeman, Roman Zwicky

We investigate the nucleon and pion gravitational $D$-form factors, by fitting a $\sigma /f_0(500)$-meson pole, together with a background term, to lattice data at $m_π\approx 170\text{M…