Investigating nucleon resonances in the pp→ K⁺K⁺ΛΛ reaction

@misc{zhang2026investigating,
  title = {{Investigating nucleon resonances in the $pp\to K^+K^+ΛΛ$ reaction}},
  author = {Zi-Zhao Zhang and Xu Cao and Bo-Chao Liu and Zi-Xi Ou-Yang and Ke Wang and Yin-Jie Wang and Jia-Jun Wu and Zhi-Hong Ye},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.04770},
  eprint = {2611.04770},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.04770},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - Investigating nucleon resonances in the pp→ K^+K^+ΛΛ reaction
AU  - Zi-Zhao Zhang
AU  - Xu Cao
AU  - Bo-Chao Liu
AU  - Zi-Xi Ou-Yang
AU  - Ke Wang
AU  - Yin-Jie Wang
AU  - Jia-Jun Wu
AU  - Zhi-Hong Ye
PY  - 2026
DA  - 2026/11/03
PB  - arXiv
DO  - 10.48550/arxiv.2611.04770
UR  - https://arxiv.org/abs/2611.04770
AB  - In this work, we investigate the pp → K^+ K^+ ΛΛ reaction using an effective Lagrangian approach and the isobar model. The calculation includes the exchange of π, η, σ, ρ, ω, and K mesons, as well as contributions from eight nucleon resonances: N(1535), N(1650), N(1710), N(1720), N(1895), N(1900), N(2060) and N(2120). The double-resonance excitation mechanism (NN → N^* N^*) is found to dominate this reaction over the entire energy range considered. Among the exchanged mesons, the η exchange provides the largest contribution at lower energies, whereas the K exchange dominates at higher energies. Near the threshold, N(1535) and N(1650) play the most important roles, while at higher energies N(1710) and N(1720) become dominant. Due to isospin conservation, this reaction is predominantly coupled to nucleon resonances, providing a relatively clean channel for N^* spectroscopy. Our results indicate the unique potential of this reaction for studying nucleon resonances and provide a theoretical reference for future experimental studies at HIAF.
ER  -