K⁺-nucleus potentials from K⁺-nucleon amplitudes

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• 作者：E. Friedman ^{elifried@cc.huji.ac.il" class="auth_mail" title="E-mail the corresponding author}
• 关键词：K+K+-nucleon amplitudes ; K+K+-nucleus optical potentials ; K+K+-nucleus reaction and total cross section ; Medium-dependent effects
• 刊名：Nuclear Physics A
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：954
• 期：Complete
• 页码：114-124
• 全文大小：307 K

文摘

Optical potentials for k to view the MathML source">K⁺$K^{+}$-nucleus interactions are constructed from k to view the MathML source">K⁺$K^{+}$-nucleon amplitudes using recently developed algorithm based on k to view the MathML source">K⁺$K^{+}$-N kinematics in the nuclear medium. With the deep penetration of k to view the MathML source">K⁺$K^{+}$ mesons into the nucleus at momenta below k to view the MathML source">800 MeV/c$800\text{MeV}/c$ it is possible to test this approach with greater sensitivity than hitherto done with k to view the MathML source">K⁻$K^{-}$ and pions. The energy-dependence of experimental reaction and total cross sections on nuclei is better reproduced with this approach compared to fixed-energy amplitudes. The inclusion of Pauli correlations in the medium also improves the agreement between calculation and experiment. The absolute scale of the cross sections is reproduced very well for ⁶Li but for C, Si and Ca calculated cross sections are (k to view the MathML source">23±4$23\pm 4$)% smaller than experiment, in agreement with earlier analyses. Two phenomenological models that produce such missing strength suggest that the imaginary part of the potential needs about 40% enhancement.