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arXiv 1102.4515nucl-thhep-phnucl-ex
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手征激发的K^-核势

Chirally motivated K^- nuclear potentials

A. Cieplý, E. Friedman, A. Gal, D. Gazda, J. Mareš

摘要:

在介质中亚阈KbarN散射振幅计算的手征激发的介子-重子耦合通道模型自洽地使用面对K^-原子数据在整个周期表。在核物质密度下,Re V_{chiral} = -(85+/-5)MeV,与某些方法从阈值振幅导出的浅势相比,得到了更深的K^-核势。当KbarNN的贡献唯象地结合时,一个非常深的K^-核势的结果,Re V_{chiral+phen.} = -(180+/-5)MeV,与纯唯象拟合数据得到的密度相关势一致。报道并讨论了K^-核准束缚态的自洽动力学计算。

英文摘要:

In-medium subthreshold KbarN scattering amplitudes calculated within a chirally motivated meson-baryon coupled-channel model are used self consistently to confront K^- atom data across the periodic table. Substantially deeper K^- nuclear potentials are obtained compared to the shallow potentials derived in some approaches from threshold amplitudes, with Re V_{chiral} = -(85+/-5) MeV at nuclear matter density. When KbarNN contributions are incorporated phenomenologically, a very deep K^- nuclear potential results, Re V_{chiral+phen.} = -(180+/-5) MeV, in agreement with density dependent potentials obtained in purely phenomenological fits to the data. Self consistent dynamical calculations of K^- nuclear quasibound states are reported and discussed.

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