Radial sensitivity of kaonic atoms and strongly bound $\bar{K}$ states

Abstract

The strength of the low energy K^- nucleus real potential has recently received renewed attention in view of experimental evidence for the possible existence of strongly bound K^- states. Previous fits to kaonic atom data led to either 'shallow' or to 'deep' potentials, where only the former are in agreement with chiral approaches but only the latter can produce strongly bound states. Here we explore the uncertainties of the K^- nucleus optical potentials, obtained from fits to kaonic atom data, using the functional derivatives of the best-fit chi^2 values with respect to the potential. We find that only the deep type of potential provides information which is applicable to the K^- interaction in the nuclear interior.

arXiv comment4 pages, 4 figures minor additions, PRC Rapid Communication (in press)

References in corpus (5)

• The properties of \bar{K} in the nuclear medium
• A critical view on the deeply bound K^- pp system
• Study of chirally motivated low-energy $K^{-}$ optical potentials
• $\bar{K}$ nuclear bound states in a dynamical model
• A search for deeply bound kaonic nuclear states

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• Kaonic atoms and in-medium K-N amplitudes II: interplay between theory and phenomenology
• Kaonic atoms and in-medium $K^{-}N$ amplitudes
• Unified approach to nuclear densities from exotic atoms
• In-medium antikaon interactions and bound states
• Nuclear density probed by Kaon-Nucleus systems and Kaon-Nucleus interaction
• Antikaon-nucleus dynamics: from quasibound states to kaon condensation