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)
UR - https://www.scopus.com/pages/publications/77649314492
UR - https://www.scopus.com/pages/publications/77649314492#tab=citedBy
U2 - 10.1016/j.nuclphysa.2010.01.175
DO - 10.1016/j.nuclphysa.2010.01.175
M3 - Article
AN - SCOPUS:77649314492
SN - 0375-9474
VL - 835
SP - 59
EP - 66
JO - Nuclear Physics A
JF - Nuclear Physics A
IS - 1-4
ER -