Ξπ Resonance with mass 1606 MeV/c2

Ross, R. T.; Buran, T.; Lloyd, J. L.; Mulvey, J.H.; Radojičić, D.

doi:10.1016/0370-2693(72)90043-3

Cited by 25 publications

(16 citation statements)

References 3 publications

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“…which are consistent with the earlier measured values [3,4]. Its spin-parity, however, remains undetermined.…”

Section: Introductionsupporting

confidence: 92%

Radiative decay of the $Ξ(1620)$ in a hadronic molecule picture

Zhu¹,

Yang²,

Huang³

2021

Preprint

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Last year, the Ξ(1620) state that is cataloged in the Particle Data Group (PDG) with only one star is reported again in the Ξ − π + final state by the Belle Collaboration. Its properties not only the spectroscopy but also the decay width cannot be simply explained in the context of conventional constituent quark models. This intrigues an active discussion on the structure of this resonance. In this work, we study the radiative decays of the newly observed Ξ(1620) assuming that it is a meson-baryon molecular state of Λ K and Σ K with spin-parity J P = 1/2 − in our previous work. The partial decay widths of the Λ K − Σ K molecular state into Ξγ and Ξπγ final states through hadronic loops are evaluated with the help of the effective Lagrangians. The partial widths for the Ξ(1620) 0 → γΞ and Ξ(1620) 0 → γΞπ are evaluated to be about 118.76 − 174.21 KeV and 58.19 − 68.75 eV, respectively, which may be accessible for the LHCb. If the Ξ( 1620) is Λ K −Σ K molecule, the radiative transition strength Ξ(1620) 0 → γ KΛ is quite small and the decay width is of the order of 0.01 eV. Future experimental measurements of these processes can be useful to test the molecule interpretations of the Ξ(1620).

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“…which are consistent with the earlier measured values [3,4]. Its spin-parity, however, remains undetermined.…”

Section: Introductionsupporting

confidence: 92%

Radiative decay of the $Ξ(1620)$ in a hadronic molecule picture

Zhu¹,

Yang²,

Huang³

2021

Preprint

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“…Recently, the Belle Collaboration [1] announced the observation of Ξð1620Þ 0 in the Ξ − c π þ invariant mass spectrum of the Ξ þ c → Ξ − π þ π þ process, which confirmed early experimental evidence of Ξð1620Þ existing in the K − p reaction in the 1970s [2][3][4]. The measured mass and width are M ¼ 1610.4 AE 6.0ðstatÞ þ5.9 −3.5 ðsystÞ MeV; Γ ¼ 59.9 AE 4.8ðstatÞ þ2.8 −3.0 ðsystÞ MeV;…”

Section: Introductionmentioning

confidence: 70%

K¯Λ molecular explanation to the newly observed Ξ(1620)0
Chen
¹
,
Chen
²
,
Sun
³

et al. 2019
Phys. Rev. D
17
0
15
1
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The newly observed Ξð1620Þ 0 by the Belle Collaboration inspires our interest in performing a systematic study on the interaction of an antistrange meson ðK ðÃÞ Þ with a strange or doubly strange ground octet baryon B (Λ, Σ, and Ξ), where the spin-orbit force and the recoil correction are considered in the adopted one-boson-exchange model. Our results indicate that Ξð1620Þ 0 can be explained as aKΛ molecular state with IðJ P Þ ¼ 1=2ð1=2 − Þ and the intermediate force from σ exchange plays an important role. Additionally, we also predict several other possible molecular candidates, i.e., theKΣ molecular state with IðJ P Þ ¼ 1=2ð1=2 − Þ and the triply strangeKΞ molecular state with IðJ P Þ ¼ 0ð1=2 − Þ.

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“…Experimental evidence for the Ξð1620Þ → Ξπ decay was reported in K − p interactions in the 1970s [5][6][7]. The mass and width measurements are consistent but have large statistical uncertainties.…”

mentioning

confidence: 86%