利用 BGOOD 实验在临界点附近的正向角进行 $K^+Λ(1520)$ 光生成

arXiv - PHYS - Nuclear Experiment Pub Date : 2024-06-03 DOI:arxiv-2406.01121

E. O. Rosanowski, T. C. Jude, S. Alef, A. J. Clara Figueiredo, R. Di Salvo, D. Elsner, A. Fantini, O. Freyermuth, F. Frommberger, F. Ghio, J. Groß, K. Kohl, P. Levi Sandri, G. Mandaglio, R. Messi, D. Moricciani, P. Pedroni, B. -E. Reitz, M. Romaniuk, G. Scheluchin, H. Schmieden, A. Sonnenschein

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引用次数: 0

摘要

在BGOOD实验中，测量了从阈值到2090\,MeV质量中心能量正向角度的$\gamma p\rightarrow K^+\Lambda(1520)$的差分截面。质量中心能量和角度的高统计精度和高分辨率使我们能够详细描述这个低动量传递运动学区域。这些数据与先前的 LEPS 测量结果一致，并支持有效拉格朗日模型，该模型表明接触项在临界值附近的截面中占主导地位。

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$K^+Λ(1520)$ photoproduction at forward angles near threshold with the BGOOD experiment

The differential cross section for $\gamma p\rightarrow K^+\Lambda(1520)$ was measured from threshold to a centre-of-mass energy of 2090\,MeV at forward angles at the BGOOD experiment. The high statistical precision and resolution in centre-of-mass energy and angle allows a detailed characterisation of this low-momentum transfer kinematic region. The data agree with a previous LEPS measurement and support effective Lagrangian models that indicate that the contact term dominates the cross section near threshold.

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arXiv - PHYS - Nuclear Experiment

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