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Singlet-to-triplet ratio in the deuteron breakup reaction $pd\to pnp$ at 585 MeV

Yu. N. Uzikov·V. I. Komarov·F. Rathmann·H. Seyfarth
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Abstract

Available experimental data on the exclusive $pd\to pnp$ reaction at 585 MeV show a narrow peak in the proton-neutron final-state interaction region. It was supposed previously, on the basis of a phenomenological analysis of the shape of this peak, that the final spin-singlet $pn$ state provided about one third of the observed cross section. By comparing the absolute value of the measured cross section with that of $pd$ elastic scattering using the Fäldt-Wilkin extrapolation theorem, it is shown here that the $pd\to pnp$ data can be explained mainly by the spin-triplet final state with a singlet admixture of a few percent. The smallness of the singlet contribution is compatible with existing $pN\to pNπ$ data and the one-pion exchange mechanism of the $pd\to pnp$ reaction.

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Yu. N. Uzikov, V. I. Komarov, F. Rathmann, H. Seyfarth. 2001-10-16. Singlet-to-triplet ratio in the deuteron breakup reaction $pd\to pnp$ at 585 MeV. https://doi.org/10.1016/s0370-2693(01)01398-3

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