Electromagnetic Structure of the $ρ$ Meson in the Light-Front Quark Model

Details Electromagnetic Structure of the $ρ$ Meson in the Light-Front Quark Model Electromagnetic Structure of the $ρ$ Meson in the Light-Front Quark Model

2004-02-11

arxiv.org/abs/hep-ph/0402114v1

Phys.Rev. D70 (2004) 053015

Physics

High Energy Physics

High Energy Physics - Phenomenology

14pages, 5figures

Scientific paper

10.1103/PhysRevD.70.053015

We investigate the elastic form factors of the rho meson in the light-front quark model(LFQM). With the phenomenologically accessible meson vertices including the one obtained by the Melosh transformation frequently used in the LFQM, we find that only the helicity $0\to 0$ matrix element of the plus current receives the zero-mode contribution. We quantify the zero-mode contribution in the helicity $0\to 0$ amplitude using the angular condition of spin-1 system. After taking care of the zero-mode issue, we obtain the magnetic($\mu$) and quadrupole($Q$) moments of the rho meson as $\mu=1.92$ and $Q=0.43$, respectively, in the LFQM consistent with the Melosh transformation and compare our results with other available theoretical predictions.

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