Measurement of Born Cross Section for e⁺e^-→ K_S⁰Ξ̅⁺Σ^-+c.c. at √s = 3.51−4.95 GeV

@misc{collaboration2026measurement,
  title = {{Measurement of Born Cross Section for $e^+e^-\to K_S^0\barΞ^+Σ^-+\rmc.c.$ at $\sqrts = 3.51-4.95$ GeV}},
  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 = sep,
  doi = {10.48550/arxiv.2607.22507},
  eprint = {2607.22507},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2607.22507},
}

TY  - UNPB
TI  - Measurement of Born Cross Section for e^+e^-→ K_S^0Ξ̅^+Σ^-+c.c. at √s = 3.51−4.95 GeV
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  - 2026/09/12
PB  - arXiv
DO  - 10.48550/arxiv.2607.22507
UR  - https://arxiv.org/abs/2607.22507
AB  - Using e^+e^- collision data collected with the BESIII detector at the BEPCII collider corresponding to a total integrated luminosity of 44~fb^−1, we present the first measurement of the Born cross sections for the process e^+e^-→ K_S^0Ξ̅^+Σ^- at 56 center-of-mass energies from 3.510 to 4.951~GeV. By fitting the dressed cross sections of e^+e^-→ K_S^0Ξ̅^+Σ^- with the assumption of a power-law function plus a charmonium(-like) resonance, i.e. ψ(3770), ψ(4040), ψ(4160), Y(4230), Y(4360), ψ(4415), Y(4500), Y(4660), and Y(4710), no significant signal of any charmonium(-like) state decaying into the K_S^0Ξ̅^+Σ^- is observed. Upper limits on the product of the electronic width and branching fraction at the 90% confidence level are given for each resonance. Combining this result with the previous measurement of the isospin-symmetric process $e^+e^-\to K^{-} \barΞ^{+} Σ^{0} $, the ratio of the Born cross sections, R=σ^B(e^+e^-→ K_S^0Ξ̅^+Σ^-)/σ^B(e^+e^-→ K^-Ξ̅^+Σ^0), is found to be consistent with unity.
ER  -