Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1995-05-17
Phys.Lett. B358 (1995) 191-196
Physics
Nuclear Physics
Nuclear Theory
12 pages and 2 figures. Figures are available on request
Scientific paper
10.1016/0370-2693(95)01025-L
We use multiple scattering theory to evaluate the $Q^{2}$ dependence of the forward-backward asymmetry, $A_{z}$, of the missing momentum distribution in quasielstic $A(e,e'p)$ scattering, which is expected to be affected by color transparency. The novel features of our analysis are a consistent treatment of the structure of the ejectile state formed after absorption of the virtual photon by the struck proton and a careful evaluation of the background asymmetry induced by the nonvanishing real part of the proton-nucleon scattering amplitude. We find that the absolute magnitude of $A_{z}$ is dominated by this background at the $Q^{2}$'s attainable at the Continuous Electron Beam Accelerator Facility. However, the $Q^{2}$ dependence of the asymmetry is sensitive to the onset of color transparency, whose observation in high statistics experiments appears to be feasible, particularly using light targets such as $^{12}C$ or $^{16}O$.
Benhar Omar
Fantoni Stefano
Nikolaev Nikolai N.
Speth Josef
Usmani A. A.
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