u-Channel Color Transparency Observables

Abstract

We propose to study the onset of color transparency in hard exclusive reactions in the backward regime. Guided by the encouraging JLab results on backward pion and omega electro-production data at moderate Q^2, which may be interpreted as the signal of an early scaling regime where the scattering amplitude factorizes in a hard coefficient function convoluted with nucleon to meson transition distribution amplitudes, we show that the study of these channels on nuclear targets opens a new opportunity to test the appearance of nuclear color transparency for a fast moving nucleon.

References in corpus (7)

• Measurement of Nuclear Transparency for the A(e,e' pi^+) Reaction
• Rosenbluth separation of the ${\pi }^0$ electroproduction cross section
• Ruling out color transparency in quasi-elastic ${}^{12}$C(e,e'p) up to $Q^2$ of 14.2 (GeV/c)${}^2$
• Color transparency and short-range correlations in exclusive pion photo- and electroproduction from nuclei
• QCD description of backward vector meson hard electroproduction
• Exclusive Meson Photo- and Electro-production, a Window on the Structure of Hadronic Matter
• Backward charmonium production in $\pi N$ collisions