Observation of the Higgs Boson of strong interaction via Compton scattering by the nucleon

TL;DR

This paper suggests that the sigma meson observed in Compton scattering experiments acts as the Higgs boson of strong interaction, with theoretical predictions aligning with experimental data on nucleon polarizabilities.

Contribution

It introduces the Quark-Level Linear Sigma Model prediction for the sigma meson as the strong interaction Higgs boson, linking theoretical predictions with experimental observations.

Findings

Predicted sigma meson mass of 666 MeV matches experimental data.

The sigma meson acts as the strong interaction Higgs boson.

Large-angle Compton scattering reveals effects consistent with the sigma meson.

Abstract

It is shown that the Quark-Level Linear $\sigma$ Model (QLL$\sigma$M) leads to a prediction for the diamagnetic term of the polarizabilities of the nucleon which is in excellent agreement with the experimental data. The bare mass of the $\sigma$ meson is predicted to be $m_\sigma=666$ MeV and the two-photon width $\Gamma(\sigma\to\gamma\gamma)=(2.6\pm 0.3)$ keV. It is argued that the mass predicted by the QLL$\sigma$M corresponds to the $\gamma\gamma\to\sigma\to NN$ reaction, i.e. to a $t$-channel pole of the $\gamma N\to N\gamma$ reaction. Large -angle Compton scattering experiments revealing effects of the $\sigma$ meson in the differential cross section are discussed. Arguments are presented that these findings may be understood as an observation of the Higgs boson of strong interaction while being part of the constituent quark.