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Title: Radial sensitivity of kaonic atoms and strongly bound K states

Abstract

The strength of the low-energy K{sup -}-nucleus real potential has recently received renewed attention in view of experimental evidence for the possible existence of strongly bound K{sup -} states. Previous fits to kaonic atom data led to either ''shallow'' or ''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{sup -}-nucleus optical potentials, obtained from fits to kaonic atom data, using the functional derivatives of the best-fit {chi}{sup 2} values with respect to the potential. We find that only the deep type of potential provides information that is applicable to the K{sup -} interaction in the nuclear interior.

Authors:
;  [1]
  1. Racah Institute of Physics, The Hebrew University, Jerusalem 91904 (Israel)
Publication Date:
OSTI Identifier:
20990999
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.75.022202; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CHIRALITY; KAONIC ATOMS; NUCLEI; POTASSIUM IONS; POTENTIALS; SENSITIVITY

Citation Formats

Barnea, N., and Friedman, E. Radial sensitivity of kaonic atoms and strongly bound K states. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.022202.
Barnea, N., & Friedman, E. Radial sensitivity of kaonic atoms and strongly bound K states. United States. doi:10.1103/PHYSREVC.75.022202.
Barnea, N., and Friedman, E. Thu . "Radial sensitivity of kaonic atoms and strongly bound K states". United States. doi:10.1103/PHYSREVC.75.022202.
@article{osti_20990999,
title = {Radial sensitivity of kaonic atoms and strongly bound K states},
author = {Barnea, N. and Friedman, E.},
abstractNote = {The strength of the low-energy K{sup -}-nucleus real potential has recently received renewed attention in view of experimental evidence for the possible existence of strongly bound K{sup -} states. Previous fits to kaonic atom data led to either ''shallow'' or ''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{sup -}-nucleus optical potentials, obtained from fits to kaonic atom data, using the functional derivatives of the best-fit {chi}{sup 2} values with respect to the potential. We find that only the deep type of potential provides information that is applicable to the K{sup -} interaction in the nuclear interior.},
doi = {10.1103/PHYSREVC.75.022202},
journal = {Physical Review. C, Nuclear Physics},
number = 2,
volume = 75,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}
  • We study theoretically the (K{sup -},N) reactions for the formation of the deeply bound kaonic atoms, which were predicted to be quasistable with narrow widths, using the Green's function method. We systematically consider various cases with different target nuclei and energies and find clear signals in the theoretical spectra for all cases considered in this article. The signals show very interesting structures, such as a RESONANCE DIP instead of a resonance peak. We discuss the origins of the interesting structures and the possibilities of obtaining new information on the existence of kaonic nuclei from the spectra of atomic state formations.
  • Recent precision measurements of strong interaction level shifts and widths in pionic atoms serve as the basis for new sets of parameters for the zero energy pion-nucleus potential. Different versions of the non-local component are tried with limiting forms of the Lorentz-Lorenz effect and of the dispersive term. Very good fits to the data are obtained throughout the periodic table. Many nuclei are found to meet the criticality condition for the existence of strongly bound pionic states. Some properties of these states are discussed with emphasis on the sensitivity to the range of the p-wave interaction.
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