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Production potential of hidden-strange molecular pentaquarks through the $π^-p\rightarrow K^{*}Σ$ process (2408.17076v2)

Published 30 Aug 2024 in hep-ph

Abstract: In this study, applying the effective Lagrangian approach, we investigate the reaction $\pi-p\rightarrow K{*}\Sigma$ to explore the production of the hidden-strange molecular pentaquarks $P_{s\bar{s}}$. Specifically, we analyze two scenarios, where the $JP$ quantum numbers of $P_{s\bar{s}}$ are $3/2-$ and $1/2-$. Our results show that the contribution from $s$-channel $P_{s\bar{s}}$ exchange dominates the total cross section, surpassing those from $t$-channel $K{(*)}$ exchange and $u$-channel $\Sigma$ exchange. Additionally, we present predictions for the differential cross section of the $\pi-p\rightarrow K{*}\Sigma$ process. Finally, we extend the 2-to-2 scattering process to the 2-to-3 Dalitz process and provide theoretical predictions for this scenario. Our findings suggest that the cross section for the $\pi-p \rightarrow K{*}\Sigma\rightarrow K+\pi-\Sigma0$ process can reach several tens of $\mu b$ near the threshold, making it highly favorable for experimental measurement. However, the current scarcity of experimental data for the $\pi-p\rightarrow K{*}\Sigma$ reaction at threshold energy limits our ability to determine the properties of the hidden-strange molecular pentaquarks $P_{s\bar{s}}$ and related physical quantities. Therefore, additional experimental measurements of the $\pi-p \rightarrow K{*}\Sigma$ reaction at threshold are strongly encouraged, and correlation studies could be pursued at facilities such as J-PARC, AMBER, and upcoming HIKE and HIAF meson beam experiments.

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