We have conducted a model independent analysis of the K+Kˉ0 pair correlation function obtained from ultra high energy pp collisions, with the aim of extracting the information encoded in it related to the KKˉ interaction and the coupled channel π+η. With the present large errors at small relative K+Kˉ0 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 a0 resonance, a0(980), showing as a strong cusp close to the KKˉ threshold. We also mention that the measurement of the π+η correlation function will be essential in order to constrain more the information on KKˉ dynamics that can be obtained from correlation functions.
@article{arxiv.2312.11993,
title = {Correlation function for the $a_0(980)$},
author = {R. Molina and Zhi-Wei Liu and Li-Sheng Geng and E. Oset},
journal= {arXiv preprint arXiv:2312.11993},
year = {2023}
}