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Theoretical study of f0(980), a0(980) and Ξ(1/2−) in the process Ξc+→Σ+K+K−

Ruitian Li1,*, Xuan Luo2,†, and Hao Sun1,‡

  • 1Institute of Theoretical Physics, School of Physics, Dalian University of Technology, No. 2 Linggong Road, Dalian, Liaoning, 116024, People’s Republic of China
  • 2School of Physics and Optoelectronics Engineering, Anhui University, Hefei, Anhui 230601, People’s Republic of China

  • *Contact author: liruitian@mail.dlut.edu.cn
  • †Contact author: xuanluo@ahu.edu.cn
  • ‡Contact author: haosun@dlut.edu.cn
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Phys. Rev. D 113, 074013 – Published 13 April, 2026

DOI: https://doi.org/10.1103/qm2z-w84c

Abstract

We employed the chiral unitarity approach to investigate the decay process Ξc+→Σ+K+K−, by considering that the low lying nucleon resonance Ξ(1/2−) and the low lying scalar meson f0(980) and a0(980) that could be dynamically generated through the S-wave pseudoscalar meson-octet baryon and the S-wave pseudoscalar-meson–pseudoscalar-meson interactions, respectively. In the invariant mass distributions of Σ+K− and K+K−, we observe a distinct peak structure associated with the resonant state Ξ(1/2−) and a bit enhancement near the K+K− threshold that is corresponding to the mesons f0(980) and a0(980), respectively. Consequently, we recommend more precise experimental measurements of this process in the future.

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Phys. Rev. D 113, 074013– Published 13 April, 2026
  • Received 22 January 2026
  • Accepted 24 March 2026
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