3,249 research outputs found
Theoretical Response to the Discovery of Deeply Bound Pionic States in 208Pb(d,3He) reactions
Recently, deeply bound pionic states were found experimentally in (d, He)
reactions on Pb. They found an isolated peak structure in the bound
region below the pion production threshold. We study theoretically these
excitation functions in (d, He) reactions on Pb at T=600 MeV.
We found very good agreement with the (d, He) excitation functions and
could identify the underlying structures of the pionic states. We study the
energy dependence of the (d, He) reactions and the change of the excitation
functions with the incident energy.Comment: 5 pages, Latex, Figures available on request, Z.Phys.A.accepte
A critical analysis on deeply bound kaonic states in nuclei
We make a critical analysis on the theoretical calculations that lead to
predictions of deeply bound kaonic states in nuclei. The model set-up, after
dropping several important processes and channels, leads unavoidably to an
unrealistic deep potential with a very small imaginary part. We review also the
experimental results taken as reference for the claim of deeply bound kaons. We
suggest that the peaks of the proton spectra come from absorption on a
pair of nucleons, leaving the rest of the nucleons as spectators. Based on this
conjecture we predict what would happen in other nuclei.Comment: 19 pags., 4 figs, version to be published in Phys. Rev.
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