Frame dependence of the pair contribution to the pion electromagnetic form factor in a light-front approach

AUTOR(ES)

Melo, J. P. B. C. de, Frederico, T., Pace, E., Salmè, G.

FONTE

Brazilian Journal of Physics

DATA DE PUBLICAÇÃO

2003-06

RESUMO

The frame dependence of the pair-term contribution to the electromagnetic form factor of the pion is studied within the Light Front approach. A symmetric ansatz for the pion Bethe-Salpeter amplitude with a pseudo scalar coupling of the constituent to the pion field is used. In this model, the pair term vanishes for the Drell-Yan condition, while it is dominant for momentum transfer along the light-front direction.

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