Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-09-25
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages of Latex, RevTex4 document class
Scientific paper
The measured nuclear transparencies in targets of Li, C, Al, Cu and Pb at incident momenta of 6, 10, and 12 GeV/c have been used to study the rate of proton expansion connected with (p,2p) quasielastic scattering at large momentum transfer. Simple models with linear or quadratic expansion of the effective cross section fail to simultaneously fit the measured transparencies at all three momenta. If only the 6 and 10 GeV/c transparencies are fitted, satisfactory representations can be obtained when the expansion distances for protons at 6 GeV/c are greater than 6.4 fm(linear) and 4.0 fm(quadratic). These distances are greater than those suggested by most Expansion models except the quadratic 'naive expansion' picture. However, the transparencies are well represented by the Nuclear Filtering model with no explicit expansion.
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