<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mover accent="true"><mml:mi>K</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:math>absorption within the framework of the fixed-center approximation to Faddeev equations

Bayar, M.; Oset, E.

doi:10.1103/physrevc.88.044003

Cited by 36 publications

(47 citation statements)

References 68 publications

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“…Such detailed information about K − pp will provide insights toward the understanding of the experimental results. Furthermore, two-nucleon absorption (KN N → Y N ), which is not accounted for in the current study, should be considered because it results in a large width of the nonmesonic decay mode [23]. Spectrum calculation is important for direct comparison with experimental results; this calculation is performed in Ref.…”

Section: Methodsmentioning

confidence: 99%

Fully coupled-channels complex scaling method for the K−pp system

2017

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We have developed a fully coupled-channel complex scaling method (ccCSM) for the study of the most essential kaonic nucleus, "K − pp, " which is a resonant state of aKN N -πΣN -πΛN coupledchannel system based on a theoretical viewpoint. By employing the ccCSM and imposing the correct boundary condition of resonance, the coupled-channel problem is completely solved using a phenomenological energy-independent potential. As a result of the ccCSM calculation of "K − pp, " in which all three channels are treated explicitly, we have obtained three-body resonance as a Gamow state. The resonance pole indicates that the binding energy of "K − pp" and the half value of its mesonic decay width are 51 MeV and 16 MeV, respectively. In the analysis of the resonant wave function obtained using the ccCSM, we clarify the spatial configuration and channel compositions of "K − pp." Compared with past studies of single-channel calculations based on effectiveKN potentials, the current study provides a guideline for the determination of theKN energy to be used in effective potentials.

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Section: Methodsmentioning

confidence: 99%

Fully coupled-channels complex scaling method for the K−pp system

2017

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“…This analysis was strongly criticized [34] due to the unrealistic treatment of theKN interaction. Recent improved calculations using different few-body methods with diverseKN input [35][36][37][38][39][40][41][42][43][44] predict few-nucleon kaonic states with large widths, although the predicted binding energies and widths differ substantially from one model to the other. Thus, the experimental quest for such deeply bound kaonic states is an active field of research [45][46][47][48][49][50][51], that will allow to further constrain thē KN interaction in the near future.…”

Section: Introductionmentioning

confidence: 99%

Antistrange meson-baryon interaction in hot and dense nuclear matter

et al. 2014

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We present a study of in-medium cross sections and (off-shell) transition rates for the most relevant binary reactions for strange pseudoscalar meson production close to threshold in heavy-ion collisions at FAIR energies. Our results rely on a chiral unitary approach in coupled channels which incorporates the s-and p-waves of the kaonnucleon interaction. The formalism, which is modified in the hot and dense medium to account for Pauli blocking effects, mean-field binding on baryons, and pion and kaon self-energies, has been improved to implement unitarization and self-consistency for both the s-and p-wave interactions at finite temperature and density. This gives access to in-medium amplitudes in several elastic and inelastic coupled channels with strangeness content S = −1. The obtained total cross sections mostly reflect the fate of the Λ(1405) resonance, which melts in the nuclear environment, whereas the off-shell transition probabilities are also sensitive to the in-medium properties of the hyperons excited in the p-wave amplitudes [Λ, Σ and Σ * (1385)]. The single-particle potentials of these hyperons at finite momentum, density and temperature are also discussed in connection with the pertinent scattering amplitudes. Our results are the basis for future implementations in microscopic transport approaches accounting for off-shell dynamics of strangeness production in nucleus-nucleus collisions.

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“…AdditionalKNN → YN contributions of up to ∼10 MeV in K − pp [23] (see, however, the estimate ΓK NN→YN ∼ 30 MeV made in Ref. [25]) and ∼20 MeV in the fourbody systems [13] are foreseen. Altogether, widths of order 50 MeV or higher are anticipated for few-body kaonic quasibound states.…”

Section: Few-body Kaonic Quasibound Statesmentioning

confidence: 94%