The phenomenological representation of - scattering and reaction amplitudes

Dalitz, R.H.; Tuan, S. F.

doi:10.1016/0003-4916(60)90001-4

Cited by 603 publications

(315 citation statements)

References 28 publications

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“…Coupled channels play an essential role in this scheme, as the chiral Lagrangians provide the corresponding transitions within the multiplets, and even physically closed channels can contribute effectively. It is interesting to note that, even without chiral Lagrangians, the use of basic interactions for the coupled channels calls for an interpretation of some resonances like the Λ(1405) as quasibound states of the scattering problem [1,2].…”

Section: Introductionmentioning

confidence: 99%

Radiative decay of theΛ*(1520)

2006

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A recently developed non-perturbative chiral approach to dynamically generate the 3/2 − baryon resonances has been extended to investigate the radiative decays Λ * (1520) → γΛ(1116) and Λ * (1520) → γΣ 0 (1193). We show that the Λ * (1520) decay into γΛ is an ideal test for the need of extra components of the resonance beyond those provided by the chiral approach since the largest meson-baryon components give no contribution to this decay. The case is different for γΣ decay where the theory agrees with experiment, though the large uncertainties of these data call for more precise measurements.

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Section: Introductionmentioning

confidence: 99%

Radiative decay of theΛ*(1520)

2006

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“…One of the typical examples of hadronic molecules is the Λ(1405) baryon resonance which appears near theKN threshold. It is considered as aKN quasi-bound state in theKN-πΣ coupled-channel analyses [15,16] (see Refs. [17,18] for recent reviews).…”

Section: Introductionmentioning

confidence: 99%

Hadron-hadron Correlation And Interaction from Heavy-ion Collisions

Ohnishi¹

2017

Proceedings of the 26th International Nuclear Physics Conference — PoS(INPC2016)

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We investigate the ΛΛ and K − p intensity correlations in high-energy heavy-ion collisions. First, we examine the dependence of the ΛΛ correlation on the ΛΛ interaction and the ΛΛ pair purity probability λ. For small λ, the correlation function needs to be suppressed by the ΛΛ interaction in order to explain the recently measured ΛΛ correlation data. By comparison, when we adopt the λ value evaluated from the experimentally measured Σ 0 /Λ ratio, the correlation function needs to be enhanced by the interaction. We demonstrate that these two cases correspond to the two analyses which gave opposite signs of the ΛΛ scattering length. Next, we discuss the K − p correlation function. By using the localKN potential which reproduces the kaonic hydrogen data by SIDDHARTA, we obtain the K − p correlation function. We find that the K − p correlation can provide a complementary information with the K − p elastic scattering amplitude.

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“…One of the candidates is the Λ(1405) [1], which is too light to be described by the usual three-quark model [2]. Instead, the interpretation as theKN quasibound state [3,4] has been supported, and in particular the approaches respecting chiral SU(3) symmetry of QCD do work well [1,[5][6][7][8]. For the confirmation of the dominance of such aKN molecular component in the Λ(1405), the concept of the compositeness has been used in recent works [9,10].…”

Section: Introductionmentioning

confidence: 99%

Estimation of the Spatial Structure of \(\Lambda \)(1405) with Energy-Dependent Complex \(\bar{K}N\) Potential

Miyahara¹,

Hyodo²

2017

Proceedings of the 14th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU2016)

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We study the spatial size of the Λ(1405) to clarify the exotic nature of the unstable baryon as theKN molecular state. Considering the energy dependence and the complex nature of theKN potential, we first establish the way to treat the wave function for such an energy-dependent and complex potential, respecting the orthogonality condition and the conservation of the norm. With the resulting complex mean-squared distance of theKN system, we estimate the size of the Λ(1405) qualitatively. For the quantitative discussion, we propose a prescription to obtain the real-valued mean-squared distance from the asymptotic behavior of theKN wave function. As a result, we find that the Λ(1405) has a relatively large spatial extent compared with the size of the ordinary hadrons, which indicates thē KN molecular picture of the Λ(1405).

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The phenomenological representation of - scattering and reaction amplitudes

Cited by 603 publications

References 28 publications

Radiative decay of theΛ*(1520)

Radiative decay of theΛ*(1520)

Hadron-hadron Correlation And Interaction from Heavy-ion Collisions

Estimation of the Spatial Structure of \(\Lambda \)(1405) with Energy-Dependent Complex \(\bar{K}N\) Potential

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