Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-05-19
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages + 5figs (available upon request), report DFTT 24/93
Scientific paper
Color transparency (CT) is an effect of suppression of nuclear shadowing of hard reactions, closely related to the color screening. A brief review of theoretical development and experimental search for CT, failed and successful, are presented. A special emphasis is made on a quantum-mechanical nature of CT, as opposed to a wide spread erroneousclassical treatment of this phenomenon. The typical predictions of the classical approach, all contradicting quantum mechanics are: - factorization of cross section of hard reactions on a nucleus;\\ - "nuclear transparency", a normalized ratio of nuclear to nucleon cross sections, cannot exceed one;\\ - the larger is a radius of a hadron, the stronger it attenuates in a nucleus;\\ - the higher is the energy of hadrons participating in a hard reaction, the less is the nuclear attenuation;\\ - due to CT hard processes provide a better opportunity to study Fermi-momentum distribution, than soft reactions; etc. (Talk presented at XXVIII Rencontres de Moriond, March 1993)
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