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Faddeev calculation of a K- pp quasibound state
N V Shevchenko1, A Gal, J Mares
1Nuclear Physics Institute, 25068 Rez, Czech Republic. shevchenko@ujf.vas.cz
Abstract:
We report on the first genuinely three-body K[over]NN- piSigmaN coupled-channel Faddeev calculation in search for quasibound states in the K- pp 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 quasibound state, with I=1/2, J{pi}=0-, bound in the range B approximately 55-70 MeV, with a width of Gamma approximately 90-110 MeV. These results differ substantially from previous estimates, and are at odds with the K- pp-->Lambda p signal observed by the FINUDA collaboration.
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