CLAS12在核子共振区电产生$K^+Y$的束回缩转移极化
Beam-Recoil Transferred Polarization in $K^+Y$ Electroproduction in the Nucleon Resonance Region with CLAS12
摘要：
用美国杰斐逊实验室的CLAS-12谱仪测量了从非极化质子靶上独家电产生$K^+Λ$和$K^+Σ^0$终态的束流反冲转移极化。在6.535~GeV和7.546~GeV束流能量下的测量跨越了四动量转移$Q^2$的范围（0.3 ~ 4.5~GeV $^2$）和不变能量$W$的范围（1.6 ~ 2.4~GeV），同时覆盖了$K^+$的整个质心角范围。这些新的数据扩展了CLAS现有的超子极化数据，在类似的运动学范围内，但从一个显着更大的数据集。它们是对世界数据的重要补充，有助于更好地探索奇异性产生过程中的反应机制，进一步了解激发态核子的光谱和结构，并更好地了解非微扰动力学体系中的强相互作用。
英文摘要：
Beam-recoil transferred polarizations for the exclusive electroproduction of $K^+Λ$ and $K^+Σ^0$ final states from an unpolarized proton target have been measured using the CLAS12 spectrometer at Jefferson Laboratory. The measurements at beam energies of 6.535~GeV and 7.546~GeV span the range of four-momentum transfer $Q^2$ from 0.3 to 4.5~GeV$^2$ and invariant energy $W$ from 1.6 to 2.4~GeV, while covering the full center-of-mass angular range of the $K^+$. These new data extend the existing hyperon polarization data from CLAS in a similar kinematic range but from a significantly larger dataset. They represent an important addition to the world data, allowing for better exploration of the reaction mechanism in strangeness production processes, for further understanding of the spectrum and structure of excited nucleon states, and for improved insight into the strong interaction in the regime of non-perturbative dynamics.
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