Double-strangeness exchange reactions in a hybrid Regge-plus-resonance approach

Sang Ho Kim, Jung Keun Ahn, Shin Hyung Kim, Seung Il Nam, Myung Ki Cheoun

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1 Citation (Scopus)


We investigate double-strangeness exchange reactions, K-p→K+Ξ- and K-p→K0Ξ0, using an effective Lagrangian approach based on a hybrid Regge-plus-resonance model involving rescattering diagrams. We consider the background processes that include Λ, ς, and ς(1385) Regge trajectories in the u channel and the s-channel Born-term diagrams. The s-channel hyperon resonances account for the bump structures in the total cross sections. The s-channel Λ(2100,7/2-) and ς(2030,7/2+) resonances contribute significantly, and the ς(2250) resonance favors JP=7/2-. The interference pattern between the Λ(2100,7/2-) and ς(2030,7/2+) amplitudes is essential for describing forward differential cross sections in the resonance region 2.07<s<2.15GeV. The absence of the S=-2 meson leads to the inclusion of the meson-baryon rescattering diagrams to describe the K-p→KΞ reaction data, proving the significant contribution of the (φ,ρ,ω)-(Λ,ς) rescattering diagrams.

Original languageEnglish
Article number065202
JournalPhysical Review C
Issue number6
Publication statusPublished - 2023 Jun

Bibliographical note

Funding Information:
The study was supported by the Basic Science Research Program of the National Research Foundation of Korea (NRF) under Grants No. 2021R1A6A1A03043957 (S.-H.K. and M.-K.Ch.), No. 2020R1A2C3006177 (M.-K.Ch.), No. 2018R1A5A1025563 (S.i.N. and J.K.A.), No. 2022R1A2C1003964 (S.i.N), and No. 2022K2A9A1A0609 1761 (S.i.N).

Publisher Copyright:
© 2023 American Physical Society.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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