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

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Abstract

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 parametrization 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.

Original languageEnglish
Pages (from-to)3317-3329
Number of pages13
JournalModern Physics Letters A
Volume23
Issue number39
DOIs
Publication statusPublished - 21 Dec 2008

Keywords

  • Electromagnetic form factor
  • Electroproduction
  • Pion

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