Recent topics of mesic atoms and mesic nuclei

Yamagata-Sekihara, J.; Hirenzaki, S.; Cabrera, D.; Vacas, M. J. Vicente

doi:10.1007/978-3-642-02803-8_12

Cited by 9 publications

(13 citation statements)

References 14 publications

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“…Then, by using a scheme similar to that developed in Refs. [35][36][37][38] and the 3 He wave function summarized in Appendix A, we can evaluate the scattering amplitude T 1 as…”

Section: Scattering Amplitude: Generating An Uncorrelated λ(1405)p Symentioning

confidence: 99%

On the structure observed in the in-flight 3He(K−,Λp)n reaction at J-PARC

Sekihara

Oset

Ramos

2016

Prog. Theor. Exp. Phys.

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A theoretical investigation is done to clarify the origin of the peak structure observed near the K − pp threshold in the in-flight 3 He(K − , Λp)n reaction of the J-PARC E15 experiment, which could be a signal of the lightest kaonic nuclei, that is, the KN N (I = 1/2) state. For the investigation, we evaluate the Λp invariant mass spectrum assuming two possible scenarios to interpret the experimental peak. One assumes that the Λ(1405) resonance is generated after the emission of an energetic neutron from the absorption of the initial K − , not forming a bound state with the remaining proton. This uncorrelated Λ(1405)p system subsequently decays into the final Λp. The other scenario implies that, after the emission of the energetic neutron, a KN N bound state is formed, decaying eventually into a Λp pair. Our results show that the experimental signal observed in the in-flight 3 He(K − , Λp)n reaction at J-PARC is qualitatively well reproduced by the assumption that a KN N bound state is generated in the reaction, definitely discarding the interpretation in terms of an uncorrelated Λ(1405)p state.

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“…Then, by using a scheme similar to that developed in Refs. [35][36][37][38] and the 3 He wave function summarized in Appendix A, we can evaluate the scattering amplitude T 1 as…”

Section: Scattering Amplitude: Generating An Uncorrelated λ(1405)p Symentioning

confidence: 99%

On the structure observed in the in-flight 3He(K−,Λp)n reaction at J-PARC

Sekihara

Oset

Ramos

2016

Prog. Theor. Exp. Phys.

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“…On the theoretical side this reaction was previously studied using approximate two-step approaches in Refs. [53,54,55,56,57]. The twostep approach corresponds to a truncation of the full three-body amplitude of the final state interactions which can be calculated by solving Faddeev-type equations.…”

Section: K − D → πσN Reaction: Full Three-body Dynamicsmentioning

confidence: 99%

Antikaon–nucleon interaction and Λ(1405) in chiral SU(3) dynamics

et al. 2016

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The properties of the Λ(1405) resonance are key ingredients for determining the antikaon-nucleon interaction in strangeness nuclear physics, and the novel internal structure of the Λ(1405) is of great interest in hadron physics, as a prototype case of a baryon that does not fit into the simple threequark picture. We show that a quantitative description of the antikaonnucleon interaction with the Λ(1405) is achieved in the framework of chiral SU(3) dynamics, with the help of recent experimental progress. Further constraints on theKN subthreshold interaction are provided by analyzing πΣ spectra in various processes, such as the K − d → πΣn reaction and the Λ c → ππΣ decay. The structure of the Λ(1405) is found to be dominated by an antikaon-nucleon molecular configuration, based on its wavefunction derived from a realisticKN potential and the compositeness criteria from a model-independent weak-binding relation.

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“…The high resolution data could be used to disentangle the puzzle of the depth of the K − -nucleus interaction and to obtain new information on kaonic nuclear states. We evaluated theoretically the difference of the x-ray energy between the phenomenological and theoretical potentials for 3d → 2p transition of kaonic helium to be about 0.3 eV [33]. The difference of the level widths due to the strong absorption of kaon is also evaluated to be about 1 eV between two potentials [33].…”

Section: Kaonic Atomsmentioning

confidence: 99%