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arXiv 1809.07899nucl-ex
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在$\sqrt{s}=7$ TeV上用pp碰撞测量K-$^0_{\rm S}$-K-$^{\rm{\pm}}$相互作用

Measuring K$^0_{\rm S}$K$^{\rm{\pm}}$ interactions using pp collisions at $\sqrt{s}=7$ TeV

ALICE Collaboration

摘要:

我们提出了第一次测量的飞秒相关的K $^0_{\rm S}$和K $^{\rm \pm}$粒子在pp碰撞在$\sqrt{s}=7$ TeV的ALICE实验测量。所观察到的飞秒相关性与仅通过$a_0(980)$共振进行的终态相互作用一致。K $^0_{\rm S}$ K $^{\rm -}$和K $^0_{\rm S}$ K $^{\rm +}$的K介子源半径和相关强度参数在实验不确定度范围内是相等的。本研究的结果进行了比较,从相同的K介子飞秒研究也进行了PP碰撞在$\sqrt{s}=7$ TeV的ALICE和与K $^0_{\rm S}$ K $^{\rm \pm}$测量在$\sqrt{s_{\rm NN}}=2.76$ TeV的铅铅碰撞。结合Pb-Pb结果,我们的pp分析与$a_0(980)$具有四夸克结构而不是双夸克结构的解释是一致的.

英文摘要:

We present the first measurements of femtoscopic correlations between the K$^0_{\rm S}$ and K$^{\rm \pm}$ particles in pp collisions at $\sqrt{s}=7$ TeV measured by the ALICE experiment. The observed femtoscopic correlations are consistent with final-state interactions proceeding solely via the $a_0(980)$ resonance. The extracted kaon source radius and correlation strength parameters for K$^0_{\rm S}$K$^{\rm -}$ are found to be equal within the experimental uncertainties to those for K$^0_{\rm S}$K$^{\rm +}$. Results of the present study are compared with those from identical-kaon femtoscopic studies also performed with pp collisions at $\sqrt{s}=7$ TeV by ALICE and with a K$^0_{\rm S}$K$^{\rm \pm}$ measurement in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV. Combined with the Pb-Pb results, our pp analysis is found to be compatible with the interpretation of the $a_0(980)$ having a tetraquark structure instead of that of a diquark.

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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