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

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

2012-01-31

arxiv.org/abs/1201.6622v1

Few-Body Systems (2011)

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 4 figures. Contribution to the Proceedings of "Applications of light-cone coordinates to highly relativistic systems

Scientific paper

10.1007/s00601-011-0295-9

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 $q^+\rightarrow 0$, 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.

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