Measurement of Born cross sections of e+e-→ pK−Σ̅0 + c.c. at √s = 3.5-4.9 GeV and partial wave analysis at √s = 3.773 GeV
Abstract
Using e+e- collision data collected by the BESIII detector at BEPCII corresponding to a total integrated luminosity of 44.6 fb−1, we present the first measurement of the Born cross sections for the process e+e-→ pK−Σ̅0 + c.c. at fifty-six center-of-mass energies between 3.51 and 4.95~GeV. By fitting the dressed cross sections of e+e-→ pK−Σ̅0 + c.c. 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), ψ(4500), Y(4660) or ψ(4710), no significant charmonium(-like) state decaying into pK−Σ̅0 + c.c. is observed. The product of branching fractions and electronic partial widths including their upper limits at the 90\% confidence level are provided for each decay. In addition, a partial wave analysis of the process e+e-→ pK−Σ̅0 + c.c. at √s = 3.773 GeV is performed to investigate N*, Λ* and Σ* resonances in the K−Σ̅0 and pK− invariant mass spectra. Significant contributions are found from the Λ(1520), Σ(1670), Σ(1915), N(1900), N(2300) and N(2570). The masses, widths and production fractions for each component are determined.
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BibTeX
@misc{collaboration2026measurement,
title = {{Measurement of Born cross sections of $e^+e^-\to pK^-\barΣ^0$ + c.c. at $\sqrts$ = 3.5-4.9 GeV and partial wave analysis at $\sqrts$ = 3.773 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 M. S. Anderson 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},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.20324},
eprint = {2610.20324},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.20324},
}
RIS
TY - UNPB
TI - Measurement of Born cross sections of e^+e^-→ pK^−Σ̅^0 + c.c. at √s = 3.5-4.9 GeV and partial wave analysis at √s = 3.773 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 - M. S. Anderson
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
PY - 2026
DA - 2026/10/14
PB - arXiv
DO - 10.48550/arxiv.2610.20324
UR - https://arxiv.org/abs/2610.20324
AB - Using e^+e^- collision data collected by the BESIII detector at BEPCII corresponding to a total integrated luminosity of 44.6 fb^−1, we present the first measurement of the Born cross sections for the process e^+e^-→ pK^−Σ̅^0 + c.c. at fifty-six center-of-mass energies between 3.51 and 4.95~GeV. By fitting the dressed cross sections of e^+e^-→ pK^−Σ̅^0 + c.c. 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), ψ(4500), Y(4660) or ψ(4710), no significant charmonium(-like) state decaying into pK^−Σ̅^0 + c.c. is observed. The product of branching fractions and electronic partial widths including their upper limits at the 90\% confidence level are provided for each decay. In addition, a partial wave analysis of the process e^+e^-→ pK^−Σ̅^0 + c.c. at √s = 3.773 GeV is performed to investigate N^*, Λ^* and Σ^* resonances in the K^−Σ̅^0 and pK^− invariant mass spectra. Significant contributions are found from the Λ(1520), Σ(1670), Σ(1915), N(1900), N(2300) and N(2570). The masses, widths and production fractions for each component are determined.
ER -