Eletroweak Form Factors in the Light-Front for Spin-1 Particles

Abstract

The contribution of the light-front valence wave function to the electromagnetic current of spin-1 composite particles is not enough to warranty the proper transformation of the current under rotations. The naive derivation of the plus component of the current in the Drell-Yan-West frame within an analytical and covariant model of the vertex leads to the violation of the rotational symmetry. Computing the form-factors in a quasi Drell-Yan-West frame $q^{+}\to 0$, we were able to separate out in an analytical form the contributions from Z-diagrams or zero modes using the instant-form cartesian polarization basis.

6 pages, 4 figures. Contribution to the Proceedings of "Applications of light-cone coordinates to highly relativistic systems - LIGHTCONE 2011," 23-27 May, 2011, Dallas. To appear in Few Body Systems

References in corpus (1)

• Electromagnetic Structure of the $\rho$ Meson in the Light-Front Quark Model

Cited by in corpus (3)

• Rho-meson properties in medium
• In-medium rho-meson properties in a light-front approach
• Electromagnetic spin-1 form-factor free of zero-modes