The nucleon form factors in space-like and time-like regions

Tomasi-Gustafsson E., Rekalo M.

NUCLEAR PHYSICS A, cilt.699, 2002 (SCI İndekslerine Giren Dergi) identifier identifier


New data about electromagnetic form factors of the proton are discussed in terms of analyticity properties in space-like and in time-like region. From the constraints given by the Phragmen-Lindelof theorem, applied to the Sachs form factors, it turns out that the asymptotic regime can not be reached simultaneously for both form factors (electric and magnetic) up to s similar or equal to 14 GeV2. The angular dependence for the annihilation processes, such as (p) over bar + p <----> e(+) + e(-), is sensitive to the asymptotic properties of form factors.