PreprintarXiv licencearXiv8 Oct 2026

Observation of χ_cJ→ ΛK⁰_SΞ̅⁰ + c.c. and improved measurements of χ_cJ→ ΛK^-Ξ̅⁺ + c.c.

BESIII Collaboration
M. Ablikim
M. N. Achasov
P. Adlarson
X. C. Ai
C. S. Akondi
R. Aliberti
A. Amoroso
Q. An
Y. H. An
M. S. Anderson
Y. Bai

772 more authors

O. Bakina
H. R. Bao
X. L. Bao
M. Barbagiovanni
V. Batozskaya
K. Begzsuren
N. Berger
M. Berlowski
M. B. Bertani
D. Bettoni
F. Bianchi
E. Bianco
A. Bortone
I. Boyko
R. A. Briere
A. Brueggemann
D. Cabiati
H. Cai
M. H. Cai
X. Cai
A. Calcaterra
G. F. Cao
N. Cao
S. A. Cetin
X. Y. Chai
J. F. Chang
T. T. Chang
G. R. Che
Y. Z. Che
C. H. Chen
Chao Chen
G. Chen
H. S. Chen
H. Y. Chen
M. L. Chen
S. J. Chen
S. M. Chen
T. Chen
W. Chen
X. R. Chen
X. T. Chen
X. Y. Chen
Y. B. Chen
Y. Q. Chen
Z. K. Chen
J. Cheng
L. N. Cheng
S. K. Choi

60 listed; 784 in total.

Abstract

By analyzing (2712.4±14.3)×10⁶ ψ(3686) events collected with the BESIII detector operating at the BEPCII collider, we report the first observation of χ_cJ→ ΛK⁰_SΞ̅⁰ + c.c. (J=0,1,2) with significances greater than 10σ, including systematic uncertainties, and improved measurements of χ_cJ→ ΛK^-Ξ̅⁺ + c.c. The branching fractions of these decays are determined to be ℬ(χ_c0→ ΛK⁰_SΞ̅⁰+c.c.)=(1.13±0.13±0.13)×10⁻⁴, ℬ(χ_c1→ ΛK⁰_SΞ̅⁰+c.c.)=(0.74±0.08±0.07)×10⁻⁴, ℬ(χ_c2→ ΛK⁰_SΞ̅⁰+c.c.)=(1.16±0.11±0.14)×10⁻⁴, ℬ(χ_c0→ ΛK^-Ξ̅⁺+c.c.)=(1.90±0.08±0.16)×10⁻⁴, ℬ(χ_c1→ ΛK^-Ξ̅⁺+c.c.)=(1.40±0.05±0.11)×10⁻⁴, and ℬ(χ_c2→ ΛK^-Ξ̅⁺+c.c.)=(1.95±0.07±0.15)×10⁻⁴. The first uncertainties are statistical, and the second are systematic.

Harnessing Magnitude-Only and Complex Measurements for Improved Dynamic MRI Reconstruction with Learned Priors
Mahdi Saberi, Yaşar Utku Alçalar, Merve Gülle +2
arXiv20 Oct 2026PreprintCC BY-NC-ND 4.0Full textBiological & medical physicsarXiv
Evidence for the decay B⁰ → μ⁺ μ^- and improved measurements of the decay B⁰_s → μ⁺ μ^-
LHCb collaboration, R. Aaij, M. Abdelfatah +1,193
arXiv1 Nov 2026PreprintCC BY 4.0Full textHigh-energy & particle physicsarXiv
Improved Radiofrequency Safety Modelling in MRI Using In Vivo Measurements of Brain Conductivity
Guillaume Paillart, Zhongzheng He, Grecia Romero +5
NMR in Biomedicine23 Jun 2026Peer-reviewedCC BY 4.0Full textNeuroscience Systems & synthetic biologyHAL
Entangled Merged Pairs: The Observation-Boundary Principle
Moses Rahnama
HAL24 Oct 2026PreprintLicence not statedProbability StatisticsHAL
OGRR-Net: observation-guided residual refinement learning for photoacoustic imaging
Qi Liu, Fengchen Luo, Hengrong Lan +2
Optics Express28 Oct 2026Peer-reviewedPublisher termsOptics & photonicsCrossref

Cite

BibTeX RIS

BibTeX

@misc{collaboration2026observation,
  title = {{Observation of $χ_cJ\to ΛK^0_S\bar Ξ^0 + c.c.$ and improved measurements of $χ_cJ\to ΛK^-\bar Ξ^+ + c.c.$}},
  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.2610.11981},
  eprint = {2610.11981},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.11981},
}

RIS

TY  - UNPB
TI  - Observation of χ_cJ→ ΛK^0_SΞ̅^0 + c.c. and improved measurements of χ_cJ→ ΛK^-Ξ̅^+ + c.c.
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  - 2026/10/08
PB  - arXiv
DO  - 10.48550/arxiv.2610.11981
UR  - https://arxiv.org/abs/2610.11981
AB  - By analyzing (2712.4±14.3)×10^6 ψ(3686) events collected with the BESIII detector operating at the BEPCII collider, we report the first observation of χ_cJ→ ΛK^0_SΞ̅^0 + c.c. (J=0,1,2) with significances greater than 10σ, including systematic uncertainties, and improved measurements of χ_cJ→ ΛK^-Ξ̅^+ + c.c. The branching fractions of these decays are determined to be ℬ(χ_c0→ ΛK^0_SΞ̅^0+c.c.)=(1.13±0.13±0.13)×10^−4, ℬ(χ_c1→ ΛK^0_SΞ̅^0+c.c.)=(0.74±0.08±0.07)×10^−4, ℬ(χ_c2→ ΛK^0_SΞ̅^0+c.c.)=(1.16±0.11±0.14)×10^−4, ℬ(χ_c0→ ΛK^-Ξ̅^++c.c.)=(1.90±0.08±0.16)×10^−4, ℬ(χ_c1→ ΛK^-Ξ̅^++c.c.)=(1.40±0.05±0.11)×10^−4, and ℬ(χ_c2→ ΛK^-Ξ̅^++c.c.)=(1.95±0.07±0.15)×10^−4. The first uncertainties are statistical, and the second are systematic.
ER  -

Abstract

Related

Cite