Oscillating Color Transparency in $\pi A\to \pi p(A-1)$ and $\gamma A\to \pi N(A-1)$

Abstract

The energy dependence of $90^o$ $cm$ fixed angle scattering of $\pi p\to {\pi }^{\prime }{p}^{\prime }$ and $\gamma p\to {\pi }^{+}n$ at large momentum transfer are found to be well described in terms of interfering short and long distance amplitudes with dynamical phases induced by Sudakov effects. We calculate the color transparency ratio for the corresponding processes in nuclear environments $\pi A\to {\pi }^{\prime }p(A-1)$ and $\gamma A\to \pi N(A-1)$ taking nuclear filtering into account. A prediction that the transparency ratio for these reactions will oscillate with energy provides an important test of the Sudakov phase shift and nuclear filtering hypothesis which is testable in upcoming experiments.

5 pages, 2 figures, uses revtex

References in corpus (3)

• Energy Dependence of Nuclear Transparency in C(p,2p) Scattering
• The perturbative proton form factor reexamined
• Perturbative Color Transparency in Electroproduction Experiments

Cited by in corpus (6)

• Cross Section Measurement of Charged Pion Photoproduction from Hydrogen and Deuterium
• Pionic Color Transparency
• Generalized Parton Distributions and Color Transparency
• A relativistic framework to determine the nuclear transparency from A(p,2p) reactions
• The Generalized Counting Rule and Oscillatory Scaling
• Transparency of the $\gamma (n,p){\pi }^{-}$ reaction in nuclei