论文标题
奇怪的强子光谱法在D大厅内带有次级KL梁
Strange Hadron Spectroscopy with Secondary KL Beam in Hall D
论文作者
论文摘要
我们建议在Jefferson Lab的D厅D创建中性Kaons的次级光束,以与Gluex实验设置一起用于奇怪的HADRON光谱。上CEBAF电子梁将在$ 1 \ times 10^4〜k_l/sec $的订单上启用通量,该量超过了先前在SLAC的通量,该通量通过了三个数量级。使用Deuteron目标的使用将提供有史以来中子中性的首次测量。该实验将测量生产$λ$,$σ$,$ξ$和$ω$ hyperons的差异横截面和自我分析的极化,并使用杰斐逊实验室D的Gluex探测器D量。尺寸将跨度cm $ \\cosθ$ \cosθ$ $ 0.95 $从$ -0.95 $到0.95 $ -0.95 $ -0.95至0.95 the范围内= 1490米= 1490米。新数据将显着限制部分波分析,并减少奇怪超子共振的性质和极点位置的模型依赖性不确定性,并在$ξ$和$ω$ hyperos的光谱中建立轨道激发的多重组。与魅力和底部超子的光谱中的相应多重组进行比较,将为大范围内基于QCD的计算的准确性提供深入的了解。拟议的设施将通过测量最终状态$kπ$系统最高2 GEV不变质量对奇怪的介子部门产生决定性的影响。这将允许确定所有相关$ k^\ ast(kπ)$ $ s $ - ,$ p $ - ,$ d $ - ,$ d $ - ,$ f $ - 和$ g $ - 波的共鸣的杆位置和宽度,解决了存在或不存在标量中的量表中的问题或不存在的问题。随后,一般来说,我们对低洼标量非ET的了解。
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.