Manifestation of near-threshold ΛΛ̅ resonances in e⁺e⁻→ΛΛ̅η process

@misc{milstein2026manifestation,
  title = {{Manifestation of near-threshold $Λ\barΛ$ resonances in $e^+e^-\rightarrowΛ\barΛη$ process}},
  author = {A. I. Milstein and S. G. Salnikov},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.39526},
  eprint = {2610.39526},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.39526},
}

TY  - UNPB
TI  - Manifestation of near-threshold ΛΛ̅ resonances in e^+e^−→ΛΛ̅η process
AU  - A. I. Milstein
AU  - S. G. Salnikov
PY  - 2026
DA  - 2026/10/29
PB  - arXiv
DO  - 10.48550/arxiv.2610.39526
UR  - https://arxiv.org/abs/2610.39526
AB  - It is shown that the invariant-mass distribution of ΛΛ̅ pairs in the process e^+e^−→ΛΛ̅η can be explained by near-threshold resonances with quantum numbers J^PC=1^−− and J^PC=1^+−. The resonance with J^PC=1^−− corresponds to a loosely bound state, while the resonance with J^PC=1^+− is a virtual state above the threshold. Accounting for both resonances results in good agreement between theoretical predictions and experimental data. The predicted angular distribution of η mesons is also consistent with experimental data. It is shown that in our model there is a strong dependence of η-meson angular distribution on the invariant mass of ΛΛ̅ pair.
ER  -