Speaker
Description
We construct a light-front Hamiltonian description of the nucleon in an enlarged low-energy Fock space containing the valence $q q q$ sector, the sea-flavor $q q q q \bar{q}$ sector, and the gluonic hybrid $q q q g$ sector. The $q q q \leftrightarrow q q q q \bar{q}$ mixing is taken to be generated by the chiral pair of $\sigma$ - and $\pi$-type operators used in the nucleon-pentaquark analysis, while the $q q q \leftrightarrow q q q g$ mixing is generated by a twist-3 colorelectric operator. It induces electric-dipole transition between a color-singlet nucleon and a coloroctet three-quark core coupled to a transverse constituent gluon. We summarize the Young-tableau structure of the Pauli-allowed pentaquark and hybrid bases, derive the light-front matrix elements, and write the dressed nucleon as a normalized superposition of the three sectors. The construction makes explicit how flavor-sea and gluon-sea components enter the same Hamiltonian eigenstate and provides a starting point for computing parton distributions, form factors, and transition amplitudes at a hadronic matching scale.
| Academic Status | I am a faculty/researcher within 5 years of obtaining doctoral degree |
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