1211.6336 (E. Friedman et al.)

Kaonic atoms and in-medium K-N amplitudes II: interplay between theory
and phenomenology    [PDF]

E. Friedman, A. Gal

A microscopic kaonic-atom optical potential $V^{(1)}_{K^-}$ is constructed, using the Ikeda-Hyodo-Weise NLO chiral $K^-N$ subthreshold scattering amplitudes constrained by the kaonic hydrogen SIDDHARTA measurement, and incorporating Pauli correlations within the Waas-Rho-Weise generalization of the Ericson-Ericson multiple-scattering approach. Good fits to kaonic atom data over the entire periodic table require additionally sizable $K^-NN$--motivated absorptive and dispersive terms, in agreement with our former analysis based on a post-SIDDHARTA in-medium chirally motivated NLO separable model by Ciepl\'{y} and Smejkal. Such terms are included by introducing a phenomenological potential $V^{(2)}_{K^-}$ and coupling it self consistently to $V^{(1)}_{K^-}$. Properties of resulting kaonic atom potentials are dicussed with special attention paid to the role of $K^-$-nuclear absorption and to the extraction of density-dependent $K^-NN$ amplitudes.

View original: http://arxiv.org/abs/1211.6336