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Evidence of isospin-symmetry violation in high-energy collisions of atomic nuclei

Author

Listed:
  • F. Giacosa

    (Jan Kochanowski University
    University of Frankfurt)

  • M. Gorenstein

    (Bogolyubov Institute for Theoretical Physics
    Giersch Science Center)

  • R. Poberezhniuk

    (Bogolyubov Institute for Theoretical Physics
    Giersch Science Center
    University of Houston)

  • S. Samanta

    (Kalinga Institute of Industrial Technology)

Abstract

Strong interactions preserve an approximate isospin symmetry between up (u) and down (d) quarks, part of the more general flavor symmetry. In the case of K meson production, if this isospin symmetry were exact, it would result in equal numbers of charged (K+ and K−) and neutral (K0 and $${\overline{K}}^{0}$$ K ¯ 0 ) mesons produced in collisions of isospin-symmetric atomic nuclei. Here, we report results on the relative abundance of charged over neutral K meson production in argon and scandium nuclei collisions at a center-of-mass energy of 11.9 GeV per nucleon pair. We find that the production of K+ and K− mesons at mid-rapidity is (18.4 ± 6.1)% higher than that of the neutral K mesons. Although with large uncertainties, earlier data on nucleus-nucleus collisions in the collision center-of-mass energy range $$2.6 \,

Suggested Citation

  • F. Giacosa & M. Gorenstein & R. Poberezhniuk & S. Samanta, 2025. "Evidence of isospin-symmetry violation in high-energy collisions of atomic nuclei," Nature Communications, Nature, vol. 16(1), pages 1-15, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-57234-6
    DOI: 10.1038/s41467-025-57234-6
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