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arXiv 1706.04748nucl-ex
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共振区$γd \to K^0 Λ (p)$反应微分截面和全截面的测量

Measurement of the Differential and Total Cross Sections of the $γd \to K^0 Λ (p)$ Reaction within the Resonance Region

N. Compton, C. E. Taylor, K. Hicks, P. Cole, N. Zachariou, Y. Ilieva, P. Nadel-Turonski, E. Klempt, V. A. Nikonov, A. V. Sarantsev, the CLAS Collaboration

摘要:

我们报告的差分和总截面的$γd \to K^0Λ(p)$反应的第一次测量,使用的数据从CLAS探测器在托马斯杰斐逊国家加速器设施。在两个单独的实验运行中收集的数据进行了研究,光子能量覆盖范围分别为0.8 - 3.6 GeV和0.5 - 2.6 GeV。这两个测量结果是一致的,从而使方法和系统不确定度的确定具有置信度。的截面进行了比较,从KAON-MAID理论模型(无K介子交换),偏离数据在较高的W和在向前K介子角的预测。这些数据,以及先前公布的$K^+ Λ$光生截面,提供了必要的限制核子共振谱。第一个部分波分析已被执行,描述的数据没有引入新的共振。

英文摘要:

We report the first measurement of differential and total cross sections for the $γd \to K^0Λ(p)$ reaction, using data from the CLAS detector at the Thomas Jefferson National Accelerator Facility. Data collected during two separate experimental runs were studied with photon-energy coverage 0.8 - 3.6 GeV and 0.5 - 2.6 GeV, respectively. The two measurements are consistent giving confidence in the method and determination of systematic uncertainties. The cross sections are compared with predictions from the KAON-MAID theoretical model (without kaon exchange), which deviate from the data at higher W and at forward kaon angles. These data, along with previously published cross sections for $K^+ Λ$ photoproduction, provide essential constraints on the nucleon resonance spectrum. A first partial wave analysis has been performed that describes the data without the introduction of new resonances.

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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