Evidence for Observation of Color Transparency in pa Collisions Using Global Fit and Scaling Law Analysis

Physics – High Energy Physics – High Energy Physics - Phenomenology

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(To appear in the Proceedings of the XXVIII Rencontres de Moriond, QCD and High Energy Interactions, Les Arcs, France, March 1

Scientific paper

We review a new systematic data analysis procedure for color transparency experiments and its application to the proton nucleus scattering experiment. The method extracts the hard scattering rate as well as the survival probability for the protons travelling through the nucleus directly from the data. The method requires modelling of the nuclear attenuation in terms of an effective nucleon-nucleon cross section. We can minimize this model dependence by introducing a new scaling law analysis procedure which can yield considerable information with very little theoretical input. With sufficient data the functional forms of the survival probability as well as the hard scattering can be extracted without any theoretical modelling. An analysis of the BNL data of Carroll {\it et al} shows clear evidence for observation of color transparency.

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