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arXiv 1808.05049hep-phnucl-th
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强子-强子关联函数中的耦合道效应

Coupled-channel effects in hadron-hadron correlation functions

J. Haidenbauer

摘要:

本文研究了在重离子碰撞和高能质子-质子碰撞中测量的两粒子动量关联函数。特别强调的是像$ΛΛ$或$K^-p$这样的系统,其中耦合到其他通道的影响可能是相关的。在这两种情况下,其他通道在相对较低的动量下打开,或者在反应阈值时已经打开。为了有一个坚实的基础,在实际计算中使用$ΛΛ-ΞN-ΛΣ-ΣΣ$和$πΛ-πΣ-\bar KN$的现实耦合通道相互作用。发现$ΞN$通道的开放在$ΛΛ$关联函数中留下了可以在实验中检测到的痕迹。如果提出的$H$ -二重子位于接近或低于$ΞN$的位置,它将有非常明显的效果。在$Ξ^- p$或$K^-p$等系统中,开放通道的存在确实会在低动量下显著影响关联函数,并且肯定会使任何专门的分析复杂化。

英文摘要:

Two-particle momentum correlation functions as measured in heavy ion collisions or in high-energetic proton-proton collisions are studied. Special emphasis is put on systems like $ΛΛ$ or $K^-p$ where effects from the coupling to other channels could be relevant. In both cases other channels open at relatively low momenta or are already open at the reaction threshold. To have a solid basis, realistic coupled-channel interactions for $ΛΛ-ΞN-ΛΣ-ΣΣ$ and $πΛ-πΣ-\bar KN$ are utilized in the actual calculations. It is found that the opening of the $ΞN$ channel leaves a trace in the $ΛΛ$ correlation function that could be detectable in experiments. Should the proposed $H$-dibaryon be located close to or below the $ΞN$ it will have a very pronounced effect. The presence of open channels in systems like $Ξ^- p$ or $K^-p$ does influence the correlation functions significantly at low momenta and will certainly complicate any dedicated analysis.

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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