Nucleon and gamma N -> Delta lattice form factors in a constituent quark model

Details Nucleon and gamma N -> Delta lattice form factors in a constituent quark model Nucleon and gamma N -> Delta lattice form factors in a constituent quark model

2008-11-30

arxiv.org/abs/0812.0187v2

J.Phys.G36:115011,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

To appear in J.Phys.G

Scientific paper

10.1088/0954-3899/36/11/115011

A covariant quark model, based both on the spectator formalism and on vector meson dominance, and previously calibrated by the physical data, is here extended to the unphysical region of the lattice data by means of one single extra adjustable parameter - the constituent quark mass in the chiral limit. We calculated the Nucleon (N) and the gamma N -> Delta form factors in the universe of values for that parameter described by quenched lattice QCD. A qualitative description of the Nucleon and gamma N -> Delta form factors lattice data is achieved for light pions.

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