Electromagnetic decays of excited hyperons

Umino, Yasuo; Myhrer, F.

doi:10.1016/0375-9474(91)90594-v

Cited by 24 publications

(43 citation statements)

References 29 publications

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“…A more advanced chiral approach [62,64] including gluon exchange mechanism, predicts a larger width for Γ Λγ (=75 keV), but that for Γ Σγ shrinks down to 2 keV. That work reproduces well enough the total width of Λ(1520), but underestimates that for Λ(1405).…”

Section: Numerical Results and Discussionmentioning

confidence: 56%

Role of five-quark components in radiative and strong decays of theΛ(1405)resonance

Saghai

Yuan

et al. 2010

Phys. Rev. C

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Section: Numerical Results and Discussionmentioning

confidence: 56%

Role of five-quark components in radiative and strong decays of theΛ(1405)resonance

Saghai

Yuan

et al. 2010

Phys. Rev. C

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“…first line in Eq. (20)) to a(k l ) have roughly the same value in both channels the quartic contributions are much smaller in the l = 0 case. Since in the integrand of the quartic term contributions the functions that depend on the chiral angle are peaked at short distances and the l = 0 wave function is peaked at a larger radius than the l = 1 one, this kind of behaviour is to be expected.…”

Section: Magnetic Momentsmentioning

confidence: 76%

Λ(1405) in the bound-state soliton model

Schat¹,

Scoccola²,

Gobbi³

1995

Nuclear Physics A

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The strong and electromagnetic properties of the Λ(1405) hyperon are studied in the framework of the bound state soliton model. We explicitly evaluate the strong coupling constant g Λ * N K , the Λ * magnetic moment, mean square radii and radiative decay amplitudes. The results are shown to be in general agreement with available empirical data. A comparison with results of other models is also presented. † Fellow of the CONICET, Argentina

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“…However, as said above, it is precisely the γΣ 0 (1193) final state which in our hadronic interaction picture appears enhanced. We should also mention other quark models [14,15,16,17] that enlarge and complement Ref. [13], as well as algebraic models [18] where the Λ(1520) radiative decay has been evaluated.…”

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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Electromagnetic decays of excited hyperons

Cited by 24 publications

References 29 publications

Role of five-quark components in radiative and strong decays of theΛ(1405)resonance

Role of five-quark components in radiative and strong decays of theΛ(1405)resonance

Λ(1405) in the bound-state soliton model

Radiative decay of theΛ*(1520)

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