Electromagnetic structure of the ρ mesonin the light-front quark model

We investigate the elastic form factors of the ρ mesonin the light-front quark model (LFQM). With the phenomenologically accessiblemeson vertices including the one obtained by the Melosh transformation frequentlyused in the LFQM, we find that only the helicity 0→0 matrix element of the plus current receives the zero-modecontribution. We quantify the zero-mode contribution in the helicity 0→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) momentsof the ρ mesonas μ=1.92 and $Q=0.43$, respectively, in the LFQM consistent with the Meloshtransformation and compare our results with other available theoretical predictions.