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Neutralization of antiprotons at nuclei

Authors:	Yu D Fiveiskii

Institution:	(1) Moscow Institute of Engineering Physics, USSR

Abstract:	A method is given for calculating the cross section for neutralization of $\bar p$ for medium and heavy nuclei in terms of the optical potential, by addition of the neutralization operator $V(r)\hat \tau$ . The method is reasonable for energies $\frac{{P_{\frac{2}{p}} }}{{2M\bar p}} \gg \left( {M\bar n---M\bar p} \right)c^2$ . Explicit forms are obtained for the differential and total cross sections for an optical potential in the form of a complex rectangular well, V(r) = V₀., in which V₀ differs; from zero within the nucleus and $\frac{{P_{\frac{2}{p}} }}{{2M\bar p}} \gg \frac{{Z - e^4 M\bar p}}{{2h^{ - 2} }}$ . The value of V_o corresponding to the observed cross section for lead is derived. The dependence of the total cross section on V₀ for copper is given.I am indebted to P. E. Nemirovskii for direction and valuable advice.

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