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Asymptotic behavior of the proton electromagnetic form factor with pion exchanges in the ladder approximation

Journal Article · · Phys. Rev., D; (United States)
The asymptotic behavior of the proton electromagnetic form factor due to virtual pion exchanges is studied by restricting to a class of ladder diagrams. We set up an off-mass-shell integral equation for the modified proton-proton-photon vertex due to virtual pion exchanges by summing up an infinite number of ladder diagrams. This integral equation is converted into a set of coupled differential equations involving Lorentz-invariant amplitudes. From the solutions of the differential equations it is found that the usual form factor is modified by a factor exp)(-1/2 +- (1/2)(1-g/sup 2//..pi../sup 2/)/sup 1/2/)lnt) at large momentum transfers, where g is the pion-nucleon coupling constant.
Research Organization:
Physics Department, Visva-Bharati, Santiniketan 731235, India
OSTI ID:
5001627
Journal Information:
Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 22:8; ISSN PRVDA
Country of Publication:
United States
Language:
English

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