Measurement of branching fractions for ψ(3686)→γη' , γη , and γπ0

Ablikim, M.; Achasov, M. N.; Ahmed, S.; Albrecht, M.; Alekseev, M.; Amoroso, A.; An, F. F.; An, Q.; Bai, J. Z.; Bai, Y.; Bakina, O.; Baldini Ferroli, R.; Ban, Y.; Bennett, D. W.; Bennett, J. V.; Berger, N.; Bertani, M.; Bettoni, D.; Bianchi, F.; Boger, E.; Boyko, I.; Briere, R. A.; Cai, H.; Cai, X.; Cakir, O.; Calcaterra, A.; Cao, G. F.; Cetin, S. A.; Chai, J.; Chang, J. F.; Chelkov, G.; Chen, G.; Chen, H. S.; Chen, J. C.; Chen, M. L.; Chen, S. J.; Chen, X. R.; Chen, Y. B.; Chu, X. K.; Cibinetto, G.; Cossio, F.; Dai, H. L.; Dai, J. P.; Dbeyssi, A.; Dedovich, D.; Deng, Z. Y.; Denig, A.; Denysenko, I.; Destefanis, M.; De Mori, F.; Ding, Y.; Dong, C.; Dong, J.; Dong, L. Y.; Dong, M. Y.; Dorjkhaidav, O.; Dou, Z. L.; Du, S. X.; Duan, P. F.; Fang, J.; Fang, S. S.; Fang, Y.; Farinelli, R.; Fava, L.; Fegan, S.; Feldbauer, F.; Felici, G.; Feng, C. Q.; Fioravanti, E.; Fritsch, M.; Fu, C. D.; Gao, Q.; Gao, X. L.; Gao, Y.; Gao, Y. 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doi:10.1103/PhysRevD.96.052003

Title: Measurement of branching fractions for $ψ (3686) \to γ η^{'}$ , $γ η$ , and $γ π^{0}$

Journal Article · Mon Sep 25 00:00:00 EDT 2017 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.96.052003· OSTI ID:1440863

Ablikim, M.; Achasov, M. N.; Ahmed, S.; Albrecht, M.; Alekseev, M.; Amoroso, A.; An, F. F.; An, Q.; Bai, J. Z.; Bai, Y.; Bakina, O.; Baldini Ferroli, R.; Ban, Y.; Bennett, D. W.; Bennett, J. V.; Berger, N.; Bertani, M.; Bettoni, D.; Bianchi, F.; Boger, E. more »

In this paper, using a data sample of 448 x 10⁶ ψ(3686) events collected with the BESIII detector operating at the BEPCII storage ring, the decays ψ(3686) → γη and ψ(3686) → γπ⁰ are observed with a statistical significance of 7.3σ and 6.7σ, respectively. The branching fractions are measured to be β(ψ(3686) → γη) = (0.85 ± 0.18 ± 0.05) x 10^-6 and β(ψ(3686) → γπ⁰) = (0.95 ± 0.16 ± 0.05) x 10^-6. Finally, in addition, we measure the branching fraction of ψ(3686) → γη' to be β(ψ(3686) → γη') = (125.1 ± 2.2 ± 6.2) x 10^-6, which represents an improvement of precision over previous results.

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Research Organization:: George Washington Univ., Washington, DC (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Organization:: BESIII Collaboration

Grant/Contract Number:: SC0016583; FG02-05ER41374; SC0010118; SC0010504; SC0012069

OSTI ID:: 1440863

Alternate ID(s):: OSTI ID: 1394703

Journal Information:: Physical Review D, Vol. 96, Issue 5; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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Title: Measurement of branching fractions for ψ ( 3686 ) → γ η ' , γ η , and γ π 0

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Title: Measurement of branching fractions for $ψ (3686) \to γ η^{'}$ , $γ η$ , and $γ π^{0}$