D厅次级KL束的奇异强子谱
Strange Hadron Spectroscopy with Secondary KL Beam in Hall D
摘要：
我们建议在Jefferson实验室的D厅建立一个中性K介子的次级束，用于GST-X实验装置的奇异强子谱。优越的CEBAF电子束将使通量达到$1\times 10^4~K_L/sec$的数量级，这超过了以前在SLAC获得的通量三个数量级。氘核靶的使用将提供有史以来第一次测量中子上的中性K介子。实验将使用杰斐逊实验室D厅的GREX探测器测量产生的$Λ$、$Σ$、$Ξ$和$Ω$超子的微分截面和自分析极化。在W = 1490 MeV至2500 MeV范围内，测量将跨越从$-0.95$至0.95的CM $\cosθ$。新的数据将显着约束的分波分析和减少模型依赖的不确定性提取的性质和磁极位置的奇怪超子共振，并建立轨道激发多重态的$Ξ$和$Ω$超子的光谱。通过与粲超子和底超子谱中相应多重态的比较，可以深入了解在大质量范围内基于QCD的计算的准确性。拟议的设施将有一个定义的影响，在奇怪的介子部门通过测量的最终状态$Kπ$系统高达2 GeV不变质量。这将允许确定所有相关的$K^\ast(Kπ)$、$S$-、$P$ -、$D$ -、$F$ -和$G$ -波共振的极位置和宽度，解决标量介子$κ/K_0^\ast(700)$的存在或不存在的问题，并改善对它们的极参数的约束。随后，提高我们的知识，一般的低位标量九元数。
英文摘要：
We propose to create a secondary beam of neutral kaons in Hall D at Jefferson Lab to be used with the GlueX experimental setup for strange hadron spectroscopy. The superior CEBAF electron beam will enable a flux on the order of $1\times 10^4~K_L/sec$, which exceeds the flux of that previously attained at SLAC by three orders of magnitude. The use of a deuteron target will provide first measurements ever with neutral kaons on neutrons. The experiment will measure both differential cross sections and self-analyzed polarizations of the produced $Λ$, $Σ$, $Ξ$, and $Ω$ hyperons using the GlueX detector at the Jefferson Lab Hall D. The measurements will span CM $\cosθ$ from $-0.95$ to 0.95 in the range W = 1490 MeV to 2500 MeV. The new data will significantly constrain the partial wave analyses and reduce model-dependent uncertainties in the extraction of the properties and pole positions of the strange hyperon resonances, and establish the orbitally excited multiplets in the spectra of the $Ξ$ and $Ω$ hyperons. Comparison with the corresponding multiplets in the spectra of the charm and bottom hyperons will provide insight into he accuracy of QCD-based calculations over a large range of masses. The proposed facility will have a defining impact in the strange meson sector through measurements of the final state $Kπ$ system up to 2 GeV invariant mass. This will allow the determination of pole positions and widths of all relevant $K^\ast(Kπ)$ $S$-,$P$-,$D$-,$F$-, and $G$-wave resonances, settle the question of the existence or nonexistence of scalar meson $κ/K_0^\ast(700)$ and improve the constrains on their pole parameters. Subsequently improving our knowledge of the low-lying scalar nonet in general.
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