Scalar mesons and polarizability of the nucleon

Abstract

It is shown that the scalar mesons $\sigma$, $f_0(980)$ and $a_0(980)$ as $t$-channel exchanges quantitatively solve the problem of diamagnetism and give an explanation of the large missing part of the electric polarizability $\alpha$ showing up when only the pion cloud is taken into account. The electric polarizability of the proton ${\alpha }_p$ confirms a two-photon width of the $\sigma$ meson of ${\Gamma }_{\sigma \gamma \gamma }=(2.58\pm 0.26)$ keV.

Cited by in corpus (6)

• The Quark-Level Linear σ Model
• Dispersion theory of nucleon Compton scattering and polarizabilities
• Structure of scalar mesons and the Higgs sector of strong interaction
• Observation of the Higgs Boson of strong interaction via Compton scattering by the nucleon
• Structure of the nucleon and spin-polarizabilities
• Note on the magnetic moment of the nucleon