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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
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Abstract

We have measured cross sections for the $ (π^+,π^\pm p)$ reactions on ${\rm ^3H}$, ${\rm ^4He}$, ${\rm ^6Li}$ and ${\rm ^7Li}$ 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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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. 2001-11-02. A Study of the $Δ^-$-component of the wave-function in light nuclei. https://doi.org/10.1016/s0370-2693(01)01329-6

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