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 , 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.
Keywords
Cite
@article{arxiv.1201.6622,
title = {Eletroweak Form Factors in the Light-Front for Spin-1 Particles},
author = {J. P. B. C. de Melo and T. Frederico},
journal= {arXiv preprint arXiv:1201.6622},
year = {2012}
}
Comments
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