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Pion Eletromagnetic Current in the Ligth-Cone Formalism

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arxiv hep-ph/9710228 v1 pith:JT5EQWWY submitted 1997-10-02 hep-ph

Pion Eletromagnetic Current in the Ligth-Cone Formalism

J. P.B. C. de Melo (Instituto de Fisica da Universidade de Sao Paulo) , H. W. L. Naus (Institute for Theoretical Physics , University of Hannover) , T. Frederico (Departamento de Fisica , ITA , Centro Tecnico Aeroespacial) This is my paper
classification hep-ph
keywords factorformcurrentelectromagneticformalismlight-conemodelpair
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The electromagnetic form factor of the pion is calculated in a pseudoscalar field theoretical model which constituent quarks. We extract the form factor using the "+" component of the electromagnetic current in the light-cone formalism. For comparison, we also compute the form factor in the covariant framework and we obtain perfect agreement. It is shown that the pair terms do not contribute in this pseudoscalar model. This explains why a naive light-cone calculation, i.e., omitting pair terms from the onset, also yields the same results.

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