论文标题
微观$ k^-nn $吸收模型的首次应用在Kaonic原子的计算中
First application of a microscopic $K^-NN$ absorption model in calculations of kaonic atoms
论文作者
论文摘要
首次使用微观$ k^ - n $ + $ k^ - nn $势源于$ k^ - n $散射幅度构建的su（3）手性耦合 - 米森 - 巴里昂互动模型。考虑到Pauli相关性引起的自由空间幅度的中等修饰。评估23个核种类的$ K^-n+K^-nn $势遇到了Kaonic Atoms数据。当包括$ k^-nn $吸收时，数据的描述大大改善。要获得$χ^2 $与$ k^-n+$现象学多核子潜力相比，仍然需要$ k^{ - } -3n（4n）$过程。但是，该现象学术语的密度依赖性指出了微观电位中的一些缺陷，并需要进一步改善所应用模型。 $ k^-n $和$ k^-nn $吸收频道的计算分支率与旧气泡室数据以及Amadeus Collocoration的最新数据都合理地达成了合理的一致性。
Strong interaction energy shifts and widths in kaonic atoms are calculated for the first time using microscopic $K^- N$ + $K^- NN$ potentials derived from $K^- N$ scattering amplitudes constructed within SU(3) chiral coupled-channels models of meson-baryon interactions. The in-medium modifications of the free-space amplitudes due to the Pauli correlations are taken into account. The $K^-N+K^-NN$ potentials evaluated for 23 nuclear species are confronted with kaonic atoms data. The description of the data significantly improves when the $K^-NN$ absorption is included. To get $χ^2$ as low as for the $K^-N+$phenomenological multi-nucleon potential an additional phenomenological term, accounting for $K^{-}-3N(4N)$ processes, is still needed. However, density dependence of this phenomenological term points out some deficiencies in the microscopic potentials and further improvements of the applied model are thus desirable. The calculated branching ratios for $K^-N$ and $K^-NN$ absorption channels in the $^{12}$C$+K^-$ atom are in reasonable agreement with the old bubble chamber data, as well as with the latest data from the AMADEUS Collaboration.
