论文标题
使用lhc处的fmttoscopic相关性来约束$ {\ rm \ overline {k} n} $耦合通道动力学
Constraining the ${\rm\overline{K}N}$ coupled channel dynamics using femtoscopic correlations at the LHC
论文作者
论文摘要
$ \ rm {k}^{ - } $与质子的相互作用的特征在于存在多个耦合的频道，例如$ {\ rm \ rm \ overline {k}^0} $ n和$πς$，具有相似的质量，与$ \ \ \ rmmmmm {k} $ stort and量相同的量子数字和相同的量子数。这些耦合到$ \ rm {k}^{ - } $ p系统的优势对于理解$λ（1405）$共振的性质和有吸引力的$ \ rm {k}^{ - } $ p强互动至关重要。在本文中，我们介绍了$ \ rm {k}^{ - } $ p相关功能在$ \ sqrt {s}〜= 〜13 $ tev中获得的相对动量空间中的功能（半）$ \ sqrt {s _ {\ mathrm {nn}}}}}〜= 〜5.02 $ tev的外围PB-PB碰撞。发射源大小由固定在$ \ rm {k}^{+} $ p相关性的核心半径和与每个粒子对特定的共振光环相关性组成，在这些碰撞系统中的1至2 fm之间变化。 $ {\ rm \ overline {k}^0} $ n和$πς$ intline的强度和效果在测得的$ \ rm {k}^{ - } $ p相关函数上，在不同的碰撞系统中调查了与芯Riral电位模型的比较，从而在不同的碰撞系统中研究了$ \ rm {k}^{ - } $ p相关函数。提出了一种确定转换权重$ω$的新方法，这是量化相关函数中产生的非弹性通道量所必需的。在这种方法中，粒子的产率是从热模型预测中估计的，其运动学分布从爆炸波拟合到测量数据。 The comparison of chiral potentials to the measured $\rm{K}^{-}$p interaction indicates that, while the $πΣ-\rm{K}^{-}$p dynamics is well reproduced by the model, the coupling to the ${\rm \overline{K}^0}$n channel in the model is currently underestimated.
The interaction of $\rm{K}^{-}$ with protons is characterised by the presence of several coupled channels, systems like ${\rm \overline{K}^0}$n and $πΣ$ with a similar mass and the same quantum numbers as the $\rm{K}^{-}$p state. The strengths of these couplings to the $\rm{K}^{-}$p system are of crucial importance for the understanding of the nature of the $Λ(1405)$ resonance and of the attractive $\rm{K}^{-}$p strong interaction. In this article, we present measurements of the $\rm{K}^{-}$p correlation functions in relative momentum space obtained in pp collisions at $\sqrt{s}~=~13$ TeV, in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}~=~5.02$ TeV, and (semi)peripheral Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}~=~5.02$ TeV. The emitting source size, composed of a core radius anchored to the $\rm{K}^{+}$p correlation and of a resonance halo specific to each particle pair, varies between 1 and 2 fm in these collision systems. The strength and the effects of the ${\rm \overline{K}^0}$n and $πΣ$ inelastic channels on the measured $\rm{K}^{-}$p correlation function are investigated in the different colliding systems by comparing the data with state-of-the-art models of chiral potentials. A novel approach to determine the conversion weights $ω$, necessary to quantify the amount of produced inelastic channels in the correlation function, is presented. In this method, particle yields are estimated from thermal model predictions, and their kinematic distribution from blast-wave fits to measured data. The comparison of chiral potentials to the measured $\rm{K}^{-}$p interaction indicates that, while the $πΣ-\rm{K}^{-}$p dynamics is well reproduced by the model, the coupling to the ${\rm \overline{K}^0}$n channel in the model is currently underestimated.
