PreprintCC BY 4.0arXiv
Search for the rare decay η′→ 3γ
Abstract
Using a data sample of (10087 ± 44) × 106 J/ψ events collected with the BESIII detector, we search for the rare decay η′→ 3γ via the process J/ψ→γη′. No significant signal is observed and an upper limit on the branching fraction of η′→ 3γ is set at ℬ(η′→ 3γ) < 2.25× 10−5 at the 90\% confidence level. This result improves the previous upper limit by more than a factor of four.
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BibTeX
@misc{ablikim2026search,
title = {{Search for the rare decay $η^\prime\to 3γ$}},
author = {M. Ablikim and M. N. Achasov and P. Adlarson and X. C. Ai and C. S. Akondi and R. Aliberti and A. Amoroso and L. P. An and Q. 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 X. K. Cai and G. F. Cao and N. Cao and X. 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 E. N. Chen and G. Chen and H. S. Chen and H. Y. Chen and J. Chen and J. D. 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},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.34311},
eprint = {2610.34311},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.34311},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Search for the rare decay η^′→ 3γ
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 - L. P. An
AU - Q. 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 - X. K. Cai
AU - G. F. Cao
AU - N. Cao
AU - X. 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 - E. N. Chen
AU - G. Chen
AU - H. S. Chen
AU - H. Y. Chen
AU - J. Chen
AU - J. D. 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
PY - 2026
DA - 2026/10/25
PB - arXiv
DO - 10.48550/arxiv.2610.34311
UR - https://arxiv.org/abs/2610.34311
AB - Using a data sample of (10087 ± 44) × 10^6 J/ψ events collected with the BESIII detector, we search for the rare decay η^′→ 3γ via the process J/ψ→γη^′. No significant signal is observed and an upper limit on the branching fraction of η^′→ 3γ is set at ℬ(η^′→ 3γ) < 2.25× 10^−5 at the 90\% confidence level. This result improves the previous upper limit by more than a factor of four.
ER -