https://doi.org/10.1051/epjconf/202531603002
Isospin-symmetry breaking in kaon production: The role of charge-symmetry
1 Institute of Physics, Jan Kochanowski University, ul. Uniwersytecka 7, 25-406, Kielce, Poland
2 Institute for Theoretical Physics, J. W. Goethe University, Max-von-Laue-Straße. 1, 60438 Frankfurt am Main, Germany
* e-mail: fgiacosa@ujk.edu.pl
Published online: 27 January 2025
An excess of charged versus neutral kaons has been recently reported by the NA61/SHINE collaboration. Similar excesses were also present in previous experiments, even if with larger errors. Models for hadron productions in heavy ion collisions systematically underestimate the measured charge-toneutral kaon ratio. In this report, we comment on the role of charge-symmetry as a specific isospin transformation. In particular, we show that the ensemble of the initial colliding nuclei being charge-symmetric is sufficient for producing an equal number of charged and neutral kaons in the isospin-symmetry exact limit.
© The Authors, published by EDP Sciences, 2025
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