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arXiv 2602.01768hep-ph
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在核子上由K介子引发的ϕΛ、D_s^{*-}Λ_c^+和J/ψΛ的产生

Production of $ϕΛ$, $D_s^{*-} Λ_c^+$, and $J/ψΛ$ in kaon-induced reactions off the nucleon

Department of Physics and Origin of Matter and Evolution of Galaxies (OMEG) Institute, Soongsil University（崇实大学物理与物质起源及星系演化（OMEG）研究所）

Sang-Ho Kim

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14 pages, 13 figures
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AI总结：

研究通过混合Regge方法分析K介子引发的核子反应，探讨ϕΛ、D_s^{*-}Λ_c^+和J/ψΛ的产生机制及贡献来源。

摘要：

我们采用混合Regge方法研究了K^-p→ϕΛ中奇异数产生反应机制，考虑了t通道K-和K*Reggeon交换。我们给出了总截面、t依赖的微分截面以及自旋密度矩阵元（SDMEs）的结果，并将其与现有实验数据进行比较。我们发现K*Reggeon交换提供了主导贡献，而KReggeon交换仍然不可忽略，特别是在描述SDMEs方面。相反，s通道Λ和u通道核子交换可以忽略不计。为了获得开放底夸克反应K^-p→D_s^{*-}Λ_c^+的可靠预测，我们采用了一个受夸克-胶子弦模型（QGSM）启发的Regge框架，该框架结合了赝标量和向量Reggeon交换。在该框架中，Regge轨迹α(t)和能量标度参数s_0被一致确定，从而约束了模型并减少了理论模糊性。对于隐藏底反应K^-p→J/ψΛ，我们使用了相同的夸克级图示对应关系。K^-p→D_s^{*-}Λ_c^+和K^-p→J/ψΛ的总截面分别比K^-p→ϕΛ的截面小约5-6个和8-9个数量级。我们还检查了可能的s通道贡献来自隐藏底五夸克态具有奇异数的P_{cs}(4337)^0和P_{cs}(4459)^0，以描述D_s^{*-}Λ_c^+和J/ψΛ的产生。

英文摘要：

We investigate the reaction mechanism of strangeness production in $K^- p \to ϕΛ$ within a hybrid Regge approach, 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 nonnegligible, 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 reaction $K^- p \to D_s^{*-} Λ_c^+$, we employ a Quark-Gluon String Model (QGSM)-motivated Regge framework that incorporates both pseudoscalar- and vector-Reggeon exchanges. Within this framework, the Regge trajectories $α(t)$ and energy-scale parameters $s_0$ are determined consistently, thereby constaining the model and reducing theoretical ambiguities. For the hidden-charm reaction $K^- p \to J/ψΛ$, we use the same quark-level diagrammatic correspondence. The total cross sections for $K^- p \to D_s^{*-} Λ_c^+$ and $K^- p \to J/ψΛ$ are suppressed by approximately 5-6 and 8-9 orders of magnitude, respectively, compared with that for $K^- p \to ϕΛ$. We also examine possible $s$-channel contributions from the hidden-charm pentaquark states with strangeness, $P_{cs}(4337)^0$ and $P_{cs}(4459)^0$, to both $D_s^{*-} Λ_c^+$ and $J/ψΛ$ production.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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