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Correlation function for the $a_0(980)$

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arxiv 2312.11993 v1 pith:EN25O2XP submitted 2023-12-19 hep-ph hep-ex

R. Molina , Zhi-Wei Liu , Li-Sheng Geng , E. Oset This is my paper · ORCID
classification hep-phhep-ex
keywords correlationfunctioninformationobtainedlargeableanalysischannel
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abstract

We have conducted a model independent analysis of the $K^+ \bar{K}^0$ pair correlation function obtained from ultra high energy $pp$ collisions, with the aim of extracting the information encoded in it related to the $K\bar{K}$ interaction and the coupled channel $\pi^+ \eta$. With the present large errors at small relative $K^+\bar{K}^0$ momenta, we find that the information obtained about the scattering matrix suffers from large uncertainties. Even then, we are able to show that the data imply the existence of the $a_0$ resonance, $a_0(980)$, showing as a strong cusp close to the $K\bar{K}$ threshold. We also mention that the measurement of the $\pi^+ \eta$ correlation function will be essential in order to constrain more the information on $K\bar{K}$ dynamics that can be obtained from correlation functions.

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Cited by 4 Pith papers

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    hep-ph 2025-08 conditional novelty 5.0 of 10

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