Junko Yamagata

In-flight (K- , p) reactions for the formation of kaonic atoms and kaonic nuclei using the Green function method

We study theoretically the kaonic atom and kaonic nucleus formations in the in-flight (K − ,p ) reactions using the Green function method, which is suited to evaluate formation rates both of stable and unstable bound systems. Weconsider 12 Cand 16 Oasthetargetsandcalculatethespectraofthe(K − ,p )reactions.Weconcludethatnopeak structure resulting from kaonic nucleus formation is expected in the reaction spectra calculated with the chiral unitary kaon-nucleus optical potential. In the spectra with the phenomenological deep kaon-nucleus potential, it may be possible to observe some structures because of the formation of the kaonic nucleus states. For all cases, we find clear signals because of the kaonic atom formations in the reaction spectra, which show very interesting structures, such as the RESONANCE DIP instead of the resonance peak for the atomic 1s state formation.

Formation of kaonic atoms and kaonic nuclei in in-flight (K-,p) reactions (Author Revised edition)

We study the kaonic atom and kaonic nucleus formation by the in-flight (

Kaon absorption from kaonic atoms and formation spectra of kaonic nuclei

K^-, p

Formation of Kaonic Atoms and Kaonic Nuclei in In-Flight (K−, p) Reactions

) reactions for C, O, Si and Ca target cases theoretically. Deeply bound kaonic atoms were predicted to exist as quasi-stable states and were expected to be observed in some proper experimental methods. Kaonic nuclear states are also expected to exist with large decay widths. We evaluate the formation cross sections of the kaonic atoms and kaonic nuclei using an effective number approach. We show that the indications of the kaonic bound states can be observed in the outgoing proton energy spectra.

STRUCTURE AND FORMATION OF KAONIC ATOMS AND KAONIC NUCLEI

Abstract.We considered the kaon absorption from atomic states into the nucleus. We found that the nuclear density probed by the atomic kaon significantly depends on the kaon orbit. Then, we re-examined the meanings of the observed strengths of one-body and two-body kaon absorption, and investigated the effects to the formation spectra of kaon bound states by in-flight (K-, p) reactions. As a natural consequence, if the atomic kaon probes a smaller nuclear density, the ratio of the two-body absorption at nuclear center is larger than the observed value in kaonic atoms, and the depth of the imaginary potential is deeper even at smaller kaon energies as in kaonic nuclear states because of the large phase space for the two-body processes. This deeper imaginary potential makes the signals of kaonic nucleus formation more unclear in the (K-, p) spectra.

Formation of deeply bound kaonic atoms in (K- , N) reactions

We theoretically study kaonic atom and kaonic nucleus formation in in-flight (K − ,p ) reactions for C, O, Si and Ca targets. Deeply bound kaonic atoms were previously predicted to exist as quasi-stable states, and it is expected that they can be observed using certain well-suited experimental methods. Kaonic nuclear states have also been predicted to exist with large decay widths. We evaluate the formation cross sections of kaonic atoms and kaonic nuclei using an effective number approach. We show that indications of kaonic bound states can be observed in the outgoing proton energy spectra.

28aSC-9 In-flight(K^-,N) spectra on light nuclei for kaon bound states formation

We study theoretically the in-flight (K−, N) reactions for the formation of systems using the microscopic chiral unitary s-wave amplitude to get deeper physical insights on the expected spectra, and to investigate the experimental feasibility of the reaction at J-PARC facility. We show the missing mass spectra of the (K−, N) reactions accompanied by the particle emissions due to absorption in nucleus.

In-Flight (K^-,p) Reactions for the formation of Kaon-Nucleus bound systems(Hadrons at finite density)

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 Greens 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.