We measured the K -series X-rays of the K−pK−p exotic atom in the SIDDHARTA experiment with a gaseous hydrogen target of 1.3 g/l1.3 g/l, which is about 15 times the ρSTPρSTP of hydrogen gas. At this density, the absolute yields of kaonic X-rays, when a negatively charged kaon stopped inside the target, were determined to be View the MathML source0.012−0.003+0.004 for KαKα and View the MathML source0.043−0.011+0.012 for all the K -series transitions KtotKtot. These results, together with the KEK E228 experiment results, confirm for the first time a target density dependence of the yield predicted by the cascade models, and provide valuable information to refine the parameters used in the cascade models for the kaonic atoms.
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机译：我们在SIDDHARTA实验中测量了K-pK-p外来原子的K系列X射线，其气态氢目标值为1.3 g / l1.3 g / l，约为氢气ρSTPρSTP的15倍。在此密度下，当带负电荷的钾离子停止在靶内时，钾离子X射线的绝对产量被确定为KαKα的绝对值。0.012-0.003 + 0.004，KαKα和0.043-0.011 + 0.012。对于所有K系列过渡KtotKtot。这些结果与KEK E228实验结果一起，首次确定了级联模型预测的目标密度与产量的目标密度相关性，并提供了有价值的信息以完善级联模型中用于钾离子原子的参数。
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