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Production of $ϕ Λ$ , $D_{s}^{* -} Λ_{c}^{+}$ , and $J / ψ Λ$ in kaon-induced reactions off the nucleon

Department of Physics and Origin of Matter and Evolution of Galaxies (OMEG) Institute, Soongsil University, Seoul 06978, South Korea

^*Contact author: shkimphy@gmail.com

Phys. Rev. D 114, 014011 – Published 6 July, 2026

DOI: https://doi.org/10.1103/84hj-fwyj

Abstract

We investigate the reaction mechanism of strangeness production in $K^{-} p \to ϕ Λ$ within a hybrid Regge framework, taking into account $t$ -channel $K$ - and $K^{*}$ -Reggeon exchanges. We present results for the total cross section, $t$ -dependent differential cross sections, and spin-density matrix elements (SDMEs), and compare them with the available experimental data. We find that $K^{*}$ -Reggeon exchange provides the dominant contribution, while $K$ -Reggeon exchange remains non-negligible, particularly in describing the SDMEs. In contrast, the $s$ -channel $Λ$ and $u$ -channel nucleon exchanges are negligible. To obtain reliable predictions for the open-charm production in $K^{-} p \to D_{s}^{* -} Λ_{c}^{+}$ , we employ a quark-gluon-string-model-motivated Regge prescription that incorporates both pseudoscalar- and vector-Reggeon exchanges. Within this prescription, the Regge trajectories $α (t)$ and energy-scale parameters $s_{0}$ are determined consistently, thereby constraining the model and reducing theoretical ambiguities. For the hidden-charm production in $K^{-} p \to J / ψ Λ$ , we use the same quark-level diagrammatic correspondence. The total cross sections for $K^{-} p \to D_{s}^{* -} Λ_{c}^{+}$ and $K^{-} p \to J / ψ Λ$ are suppressed by approximately 4–6 and 8–9 orders of magnitude, respectively, compared with that for $K^{-} p \to ϕ Λ$ . We also examine possible $s$ -channel contributions from the hidden-charm pentaquark states with strangeness, $P_{c s} (4338)^{0}$ and $P_{c s} (4459)^{0}$ , to both $D_{s}^{* -} Λ_{c}^{+}$ and $J / ψ Λ$ production.

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Phys. Rev. D 114, 014011– Published 6 July, 2026

Vol. 114, Iss. 1 — 1 July 2026

Received 3 February 2026
Accepted 10 June 2026

DOI: https://doi.org/10.1103/84hj-fwyj

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

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Production of $ϕ Λ$ , $D_{s}^{* -} Λ_{c}^{+}$ , and $J / ψ Λ$ in kaon-induced reactions off the nucleon

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Production of ϕΛ, Ds*−Λc+, and J/ψΛ in kaon-induced reactions off the nucleon

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Production of $ϕ Λ$ , $D_{s}^{* -} Λ_{c}^{+}$ , and $J / ψ Λ$ in kaon-induced reactions off the nucleon