Variational calculation of the ppK^- system based on chiral SU(3) dynamics

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dc.creatorDoté, Akinobu
dc.creatorHyodo, Tetsuo
dc.creatorWeise, Wolfram
dc.date2008-06-30
dc.date2008-11-03
dc.date.accessioned2026-07-07T12:42:34Z
dc.date.available2026-07-07T12:42:34Z
dc.descriptionThe ppK^- system, as a prototype for possible quasibound Kbar nuclei,is investigated using a variational approach. Several versions of energy dependent effective KbarN interactions derived from chiral SU(3) dynamics are employed as input, together with a realistic NN potential (Av18). Taking into account theoretical uncertainties in the extrapolations below the KbarN threshold, we find that the antikaonic dibaryon ppK^- is NOT deeply bound. With the driving s-wave KbarN interaction the resulting total binding energy is B(ppK^-) = 20 $\pm$ 3 MeV and the mesonic decay width involving KbarN -> πY is expected to be in the range 40 - 70 MeV. Properties of this quasibound ppK^- system (such as density distributions of nucleons and antikaon) are discussed. The Λ(1405), as an I=0 quasi-bound state of Kbar and a nucleon, appears to survive in the ppK^- cluster. Estimates are given for the influence of p-wave KbarN interactions and for the width from two-nucleon absorption (KbarNN -> YN) processes. With inclusionof these effects and dispersive corrections from absorption, the ppK^- binding energy is expected to be in the range 20 - 40 MeV, while the total decay width can reach 100 MeV but with large theoretical uncertainties.
dc.description18 pages, 12 figures, Resubmitted to Phys. Rev. C
dc.identifierhttps://arxiv.org/abs/0806.4917
dc.identifierhttp://arxiv.org/abs/0806.4917
dc.identifierPhys.Rev.C79:014003,2009
dc.identifierdoi:10.1103/PhysRevC.79.014003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/220121
dc.subjectNuclear Theory
dc.titleVariational calculation of the ppK^- system based on chiral SU(3) dynamics
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