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

Ho-Meoyng Choi·Chueng-Ryong Ji
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Abstract

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($μ$) and quadrupole($Q$) moments of the rho meson as $μ=1.92$ 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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Ho-Meoyng Choi, Chueng-Ryong Ji. 2004-02-11. Electromagnetic Structure of the $ρ$ Meson in the Light-Front Quark Model. https://doi.org/10.1103/physrevd.70.053015

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