$\bar K$-Nuclear Deeply Bound States?
| dc.creator | Gal, Avraham | |
| dc.date | 2006-04-25 | |
| dc.date.accessioned | 2026-07-07T10:46:59Z | |
| dc.date.available | 2026-07-07T10:46:59Z | |
| dc.description | Following the prediction by Akaishi and Yamazaki of relatively narrow $\bar K$-nuclear states, deeply bound by over 100 MeV where the main decay channel $\bar K N \to πΣ$ is closed, several experimental signals in stopped $K^-$ reactions on light nuclei have been interpreted recently as due to such states. In this talk I review (i) the evidence from $K^-$-atom data for a {\it deep} $\bar K$-nucleus potential, as attractive as $V_{\bar K}(ρ_0) \sim -(150 - 200)$ MeV at nuclear matter density, that could support such states; and (ii) the theoretical arguments for a {\it shallow} potential, $V_{\bar K}(ρ_0) \sim -(40 - 60)$ MeV. I then review a recent work by Mareš, Friedman and Gal in which $\bar K$-nuclear bound states are generated dynamically across the periodic table, using a RMF Lagrangian that couples the $\bar K$ to the scalar and vector meson fields mediating the nuclear interactions. Substantial polarization of the core nucleus is found for light nuclei, with central nuclear densities enhanced by almost a factor of two. The binding energies and widths calculated in this dynamical model differ appreciably from those calculated for a static nucleus. These calculations provide a lower limit of $Γ_{\bar K} \sim 50 \pm 10$ MeV on the width of nuclear bound states for $\bar K$ binding energy in the range $B_{\bar K} = 100 - 200$ MeV. | |
| dc.description | An updated expanded version of a talk first given in SNP'04, Osaka, July 2004. Presented at ISHIP 2006, Frankfurt, April 2006, to be published in Int. J. Mod. Phys. E | |
| dc.identifier | https://arxiv.org/abs/nucl-th/0604067 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/0604067 | |
| dc.identifier | Int.J.Mod.Phys.E16:891-903,2007 | |
| dc.identifier | doi:10.1142/S0218301307006368 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/183422 | |
| dc.subject | Nuclear Theory | |
| dc.title | $\bar K$-Nuclear Deeply Bound States? | |
| dc.type | text |