Electromagnetic decay of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Λ</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>1520</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math>

Myhrer, F.

doi:10.1103/physrevc.74.065202

Cited by 4 publications

(3 citation statements)

References 32 publications

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“…Recently, the CLAS collaboration at Jefferson Lab has reported a new measurement of the radiative decay widths of the Σ 0 (1385) and the Λ(1520) [20], which, as argued in Ref. [21], suggests that the wave functions of the hyperon ground states should contain sizable components of excited quark states (configuration mixing). As for the Λ(1405), there is no direct measurement of its radiative decay widths.…”

Section: Introductionmentioning

confidence: 99%

The radiative decay of the Λ(1405) and its two-pole structure

2007

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We evaluate theoretically the radiative decay widths into γΛ and γΣ 0 of the two poles of the Λ(1405) found in chiral unitary theories and we find quite different results for each of the two poles. We show that, depending on which reaction is used to measure the Λ(1405) radiative decays, one gives more weight to one or the other pole, resulting in quite different shapes in the γΛ(Σ 0 ) invariant mass distributions. Our results for the high-energy pole agree with those of the empirical determination of the γΛ and γΣ 0 radiative widths (based on an isobar model fitting of the K − p atom data), which are sometimes referred to as "experimental data". We have made a detailed study of the K − p → π 0 γΛ(Σ 0 ) and π − p → K 0 γΛ(Σ 0 ) reactions and have shown that they, indeed, lead to different shapes for the γΛ(Σ 0 ) invariant mass distributions. PACS. 13.40.Hq Electromagnetic decays -14.20.Jn Hyperons -13.75.-n Hadron-induced low-and intermediate-energy reactions and scattering -25.20.Lj Photoproduction reactions

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Section: Introductionmentioning

confidence: 99%

The radiative decay of the Λ(1405) and its two-pole structure

2007

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“…However, many experimental results indicate the presence of flavor SU(3) symmetry breaking [9]. Besides, the electromagnetic transition of decuplet to octet hyperons, such as Ξ(1530) − → Ξ − , is a very sensitive for probing their internal structures [30][31][32][33]. According to a relativistic quark model, the partial width for the decay Ξ(1530) − → Ξ − is predicted to be 3.1 keV [30].…”

Section: Pos(charm2020)026mentioning

confidence: 99%

Study of baryon pair production at BESIII

Wang¹

2021

Proceedings of 10th International Workshop on Charm Physics — PoS(CHARM2020)

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The BESIII detector at BEPCII Collider has collected the world's largest data sets. Some of recent results on the baryon pair production in charmonium(-like) decays, / , (3686), etc., and in the positron-electron annihilation are reported, which covers the observation of more charmonium modes, the measurement of triply-strange baryon polarization, most accurate measurements of nucleon form factor, and more precise studies for baryon pair production near threshold. These results provide a rich laboratory to test the standard model, such as probing the limitation of the quark models and spotting unrevealed aspects of the QCD description of the structure of hadron resonances.

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“…The radiative decay of resonances has always been one of the basic observables providing insight into the nature of the states. Within quark models it has been thoroughly investigated, concerning mostly the radiative decay of baryon resonances [1][2][3][4]. Regarding axial-vector mesons, the a + 1 radiative decay has been studied within different contexts, for instance vector meson dominance is used in [5,6], relating the radiative decay with the ρπ decay of the a + 1 .…”

Section: Introductionmentioning

confidence: 99%

Radiative decay intoγPof the low lying axial-vector mesons

Nagahiro¹,

Roca

Oset

2008

Phys. Rev. D

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We evaluate the radiative decay into a pseudoscalar meson and a photon of the whole set of the axial-vector mesons dynamically generated from the vectorpseudoscalar meson (V P ) interaction. We take into account tree level and loop diagrams coming from the axial-vector decay into a vector and a pseudoscalar meson. We find a large span for the values of the radiative widths of the different axial-vector mesons. In particular, we evaluate the radiative decay into Kγ of the two K 1 (1270) states, recently claimed theoretically, and discuss the experimental values quoted so far on the assumption of only one state.

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Electromagnetic decay ofΛ(1520)

Cited by 4 publications

References 32 publications

The radiative decay of the Λ(1405) and its two-pole structure

The radiative decay of the Λ(1405) and its two-pole structure

Study of baryon pair production at BESIII

Radiative decay intoγPof the low lying axial-vector mesons

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