Measurement of the proton form factor at low momentum transfer.
Abstract
Electron scattering experiments on the proton were carried out in a range of momentum transfers squared of 0.025 (Fermi -2) to be 0.65 (Fermi -2). Polyethylene was used as target material and the proton data
were normalized against carbon electron scattering data taken at
higher momentum transfer. The relative proton data obtained in this manner do not fit
the generally accepted form factor curve. Possible reasons for the deviations in view of recent suggestions
about the existence of a proton halo are offered. However, it is
not possible at the present stage of accuracy to make any definite
statement except that the data are not inconsistent with the
existence of a proton halo.
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