Can we extract the pion electromagnetic form factor from a t-channel diagram only?

Details Can we extract the pion electromagnetic form factor from a t-channel diagram only? Can we extract the pion electromagnetic form factor from a t-channel diagram only?

2008-05-13

arxiv.org/abs/0805.1800v1

Mod.Phys.Lett.A23:3317-3329,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 6 figures

Scientific paper

10.1142/S0217732308027230

We show that we are able to extract the pion electromagnetic form factor by using the recent charged pion electroproduction data from JLab and a simple t-channel diagram. For this purpose we have performed the Q2-independent and dependent analyses. The result of the first analysis is in good agreement with those of previous works and fit the Maris and Tandy model as well as the monopole parameterization which describes a pion radius of 0.672 fm. The result of the second analysis corroborates the findings in the first analysis. Our findings therefore provide a direct proof that at the given kinematics the t-channel diagram really dominates the process. This could also set a new constraint to the phenomenological models that try to describe the process.

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