Study of ϕ→ KK̅ in the amplitude analysis of D⁺→ K_S⁰K_L⁰π⁺

@misc{collaboration2026study,
  title = {{Study of $ϕ\to K\barK$ in the amplitude analysis of $D^+\to K_S^0K_L^0π^+$}},
  author = {BESIII Collaboration and M. Ablikim and M. N. Achasov and P. Adlarson and X. C. Ai and C. S. Akondi and R. Aliberti and A. Amoroso and Q. An and Y. H. An and Y. Bai and O. Bakina and H. R. Bao and X. L. Bao and M. Barbagiovanni and V. Batozskaya and K. Begzsuren and N. Berger and M. Berlowski and M. B. Bertani and D. Bettoni and F. Bianchi and E. Bianco and A. Bortone and I. Boyko and R. A. Briere and A. Brueggemann and D. Cabiati and H. Cai and M. H. Cai and X. Cai and A. Calcaterra and G. F. Cao and N. Cao and S. A. Cetin and X. Y. Chai and J. F. Chang and T. T. Chang and G. R. Che and Y. Z. Che and C. H. Chen and Chao Chen and G. Chen and H. S. Chen and H. Y. Chen and M. L. Chen and S. J. Chen and S. M. Chen and T. Chen and W. Chen and X. R. Chen and X. T. Chen and X. Y. Chen and Y. B. Chen and Y. Q. Chen and Z. K. Chen and J. Cheng and L. N. Cheng and S. K. Choi and X. Chu},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2605.11464},
  eprint = {2605.11464},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.11464},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - Study of ϕ→ KK̅ in the amplitude analysis of D^+→ K_S^0K_L^0π^+
AU  - BESIII Collaboration
AU  - M. Ablikim
AU  - M. N. Achasov
AU  - P. Adlarson
AU  - X. C. Ai
AU  - C. S. Akondi
AU  - R. Aliberti
AU  - A. Amoroso
AU  - Q. An
AU  - Y. H. An
AU  - Y. Bai
AU  - O. Bakina
AU  - H. R. Bao
AU  - X. L. Bao
AU  - M. Barbagiovanni
AU  - V. Batozskaya
AU  - K. Begzsuren
AU  - N. Berger
AU  - M. Berlowski
AU  - M. B. Bertani
AU  - D. Bettoni
AU  - F. Bianchi
AU  - E. Bianco
AU  - A. Bortone
AU  - I. Boyko
AU  - R. A. Briere
AU  - A. Brueggemann
AU  - D. Cabiati
AU  - H. Cai
AU  - M. H. Cai
AU  - X. Cai
AU  - A. Calcaterra
AU  - G. F. Cao
AU  - N. Cao
AU  - S. A. Cetin
AU  - X. Y. Chai
AU  - J. F. Chang
AU  - T. T. Chang
AU  - G. R. Che
AU  - Y. Z. Che
AU  - C. H. Chen
AU  - Chao Chen
AU  - G. Chen
AU  - H. S. Chen
AU  - H. Y. Chen
AU  - M. L. Chen
AU  - S. J. Chen
AU  - S. M. Chen
AU  - T. Chen
AU  - W. Chen
AU  - X. R. Chen
AU  - X. T. Chen
AU  - X. Y. Chen
AU  - Y. B. Chen
AU  - Y. Q. Chen
AU  - Z. K. Chen
AU  - J. Cheng
AU  - L. N. Cheng
AU  - S. K. Choi
AU  - X. Chu
PY  - 2026
DA  - 2026/10/27
PB  - arXiv
DO  - 10.48550/arxiv.2605.11464
UR  - https://arxiv.org/abs/2605.11464
AB  - We present the first amplitude analysis and branching fraction measurement of D^+ → K_S^0K_L^0π^+ decay. The analysis uses a dataset corresponding to an integrated luminosity of 20.3~fb^−1, which was recorded at a center-of-mass energy 3.773~GeV by the BESIII detector. The measured branching fraction is ℬ(D^+ → K_S^0K_L^0π^+)=(5.780±0.085± 0.052)×10^−3, where the first uncertainty is statistical and the second is systematic. Using the known value of cal B(D^+ → ϕπ^+, ϕ→ K^+K^-), we determine the relative branching fraction between ϕ→ K_S^0K_L^0 and ϕ→ K^+K^- to be ℬ(D^+ → ϕπ^+, ϕ→ K_S^0K_L^0)/ℬ(D^+ → ϕπ^+, ϕ→ K^+K^-)= 0.628±0.022± 0.015±0.017, where the third uncertainty is related to ℬ(D^+ → ϕπ^+, ϕ→ K^+K^-). This result is significantly lower than the previous world average and is consistent with the isospin expectation for the ϕ meson's coupling to charged and neutral kaon pairs.
ER  -