Are there any narrow K--nuclear states?

作者：Hrtankova Jaroslava^*; Mares Jiri

来源：Physics Letters B, 2017, 770: 342-347.

DOI：10.1016/j.physletb.2017.04.052

• Antikaon-nucleus interaction
• Antikaon annihilation
• Kaonic nuclear bound states

We performed self-consistent calculations of K--nuclear quasi-bound states using a single-nucleon K- optical potential derived from chiral meson-baryon coupled-channel interaction models, supplemented by a phenomenological K(-)multinucleon potential introduced recently to achieve good fits to kaonic atom data [1]. Our calculations show that the effect of K-multinucleon interactions on K- widths in nuclei is decisive. The resulting widths are considerably larger than corresponding binding energies. Moreover, when the density dependence of the K--multinucleon interactions derived in the fits of kaonic atoms is extended to the nuclear interior, the only two models acceptable after imposing as additional constraint the single-nucleon fraction of K- absorption at rest do not yield any kaonic nuclear bound state in majority of considered nuclei.

• 出版日期2017-7-10