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

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 experimental data. The bare mass of the sigma meson is predicted to be m(sigma) = 666 MeV and the two-photon width Gamma(sigma -> gamma gamma) = (2.6 +/- 0.3) keV. It is argued that the mass predicted by the QLL sigma M corresponds to the gamma gamma -> sigma -> N (N) over bar reaction, i.e. to a t-channel pole of the gamma N -> N gamma reaction. Large-angle Compton scattering experiments revealing effects of the s 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 the strong interaction while being a part of the constituent quark.