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Faddeev calculation of a $K^- p p$ quasi-bound state

N. V. Shevchenko·A. Gal·J. Mares
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Abstract

We report on the first genuinely three-body ${\bar K}NN - πΣN$ coupled-channel Faddeev calculation in search for quasi-bound states in the $K^- p p$ system. The main absorptivity in the $K^- p$ subsystem is accounted for by fitting to $K^- p$ data near threshold. Our calculation yields one such quasi-bound state, with $I=1/2$, $J^π=0^-$, bound in the range $B \sim 55-70$ MeV, with a width of $Γ\sim 95-110$ MeV. These results differ substantially from previous estimates, and are at odds with the $K^- p p \to Λp$ signal observed by the FINUDA collaboration.

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N. V. Shevchenko, A. Gal, J. Mares. 2007-01-23. Faddeev calculation of a $K^- p p$ quasi-bound state. https://doi.org/10.1103/physrevlett.98.082301

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