A Study of the Δ--component of the wave-function in light nuclei
E. A. Pasyuk, R. L. Boudrie, P. A. M. Gram, C. L. Morris, J. D. Zumbro, J. L. Matthews, Y. Tan, V. V. Zelevinsky, G. Glas, B. J. Kriss
Abstract
We have measured cross sections for the (π+,π p) reactions on 3H, 4He, 6Li and 7Li in quasi-free kinematics at incident pion beam energy 500 MeV. An enhancement of the (π+,π- p) cross section in this kinematics is observed. If this is interpreted as due to quasi-free scattering from pre-existing Δ components of the nuclear wave function, the extracted probabilities are in agreement with theoretical expectations.
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