The nature of Λ(1405) hyperon resonance in chiral dynamics

D. Jido; T. Sekihara; Y. Ikeda; T. Hyodo; Y. Kanada-En'yo; E. Oset

doi:10.1016/j.nuclphysa.2010.01.175

The nature of Λ(1405) hyperon resonance in chiral dynamics

D. Jido
, T. Sekihara
, Y. Ikeda
, T. Hyodo
, Y. Kanada-En'yo
, E. Oset

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

The nature of the Λ (1405) is discussed based on the unitarised coupled-channels approach with chiral dynamics (chiral unitary model). This approach describes the over(K, ̄) N scattering cross sections and the Λ (1405) spectra phenomenologically very well. With this successful description of Λ (1405), it is found that the Λ (1405) is composed by two resonance states having different coupling nature to the meson-baryon states. As a consequence, the resonance position in the πΣ invariant mass spectrum depends on the initial channel of the Λ (1405) production. To observe the Λ (1405) initiated by the over(K, ̄) N channel, K^- d → Λ (1405) n is one of the most favorable reactions. Hadronic molecule states with kaons are also discussed by emphasizing an important role of Λ (1405) as a quasibound state of over(K, ̄) N.

Original language	English
Pages (from-to)	59-66
Number of pages	8
Journal	Nuclear Physics A
Volume	835
Issue number	1-4
DOIs	https://doi.org/10.1016/j.nuclphysa.2010.01.175
Publication status	Published - Apr 1 2010
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/j.nuclphysa.2010.01.175

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title = "The nature of Λ(1405) hyperon resonance in chiral dynamics",

abstract = "The nature of the Λ (1405) is discussed based on the unitarised coupled-channels approach with chiral dynamics (chiral unitary model). This approach describes the over(K,{\= }) N scattering cross sections and the Λ (1405) spectra phenomenologically very well. With this successful description of Λ (1405), it is found that the Λ (1405) is composed by two resonance states having different coupling nature to the meson-baryon states. As a consequence, the resonance position in the πΣ invariant mass spectrum depends on the initial channel of the Λ (1405) production. To observe the Λ (1405) initiated by the over(K,{\= }) N channel, K- d → Λ (1405) n is one of the most favorable reactions. Hadronic molecule states with kaons are also discussed by emphasizing an important role of Λ (1405) as a quasibound state of over(K,{\= }) N.",

keywords = "Chiral unitary model, K over(K,{\= }) N quasibound state, Kaon induced Λ(1405) production, Structure of Λ(1405)",

author = "D. Jido and T. Sekihara and Y. Ikeda and T. Hyodo and Y. Kanada-En'yo and E. Oset",

note = "Funding Information: This work is supported in part by the Grant for Scientific Research (No. 20028004) from Japan Society for from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan. A part of this work is done under Yukawa International Project for Quark-Hadron Sciences (YIPQS).",

year = "2010",

month = apr,

day = "1",

doi = "10.1016/j.nuclphysa.2010.01.175",

language = "English",

volume = "835",

pages = "59--66",

journal = "Nuclear Physics A",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - The nature of Λ(1405) hyperon resonance in chiral dynamics

AU - Jido, D.

AU - Sekihara, T.

AU - Ikeda, Y.

AU - Hyodo, T.

AU - Kanada-En'yo, Y.

AU - Oset, E.

N1 - Funding Information: This work is supported in part by the Grant for Scientific Research (No. 20028004) from Japan Society for from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan. A part of this work is done under Yukawa International Project for Quark-Hadron Sciences (YIPQS).

PY - 2010/4/1

Y1 - 2010/4/1

N2 - The nature of the Λ (1405) is discussed based on the unitarised coupled-channels approach with chiral dynamics (chiral unitary model). This approach describes the over(K, ̄) N scattering cross sections and the Λ (1405) spectra phenomenologically very well. With this successful description of Λ (1405), it is found that the Λ (1405) is composed by two resonance states having different coupling nature to the meson-baryon states. As a consequence, the resonance position in the πΣ invariant mass spectrum depends on the initial channel of the Λ (1405) production. To observe the Λ (1405) initiated by the over(K, ̄) N channel, K- d → Λ (1405) n is one of the most favorable reactions. Hadronic molecule states with kaons are also discussed by emphasizing an important role of Λ (1405) as a quasibound state of over(K, ̄) N.

AB - The nature of the Λ (1405) is discussed based on the unitarised coupled-channels approach with chiral dynamics (chiral unitary model). This approach describes the over(K, ̄) N scattering cross sections and the Λ (1405) spectra phenomenologically very well. With this successful description of Λ (1405), it is found that the Λ (1405) is composed by two resonance states having different coupling nature to the meson-baryon states. As a consequence, the resonance position in the πΣ invariant mass spectrum depends on the initial channel of the Λ (1405) production. To observe the Λ (1405) initiated by the over(K, ̄) N channel, K- d → Λ (1405) n is one of the most favorable reactions. Hadronic molecule states with kaons are also discussed by emphasizing an important role of Λ (1405) as a quasibound state of over(K, ̄) N.

KW - Chiral unitary model

KW - K over(K, ̄) N quasibound state

KW - Kaon induced Λ(1405) production

KW - Structure of Λ(1405)

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DO - 10.1016/j.nuclphysa.2010.01.175

M3 - Article

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VL - 835

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EP - 66

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 1-4

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The nature of Λ(1405) hyperon resonance in chiral dynamics

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