Frame dependence of the pair contribution to the pion electromagnetic form factor in a light-front approach
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Data
2003-06-01
Autores
Melo, J. P. B. C. de [UNESP]
Frederico, T.
Pace, E.
Salmè, G.
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Sociedade Brasileira de Física
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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Brazilian Journal of Physics. Sociedade Brasileira de Física, v. 33, n. 2, p. 301-305, 2003.