Evidence for ηc→γγ and measurement of J/ψ→3γ

M. Ablikim; M. N. Achasov; D. J. Ambrose; F. F. An; Q. An; Z. H. An; J. Z. Bai; Y. Ban; J. Becker; J. V. Bennett; M. Bertani; J. M. Bian; E. Boger; O. Bondarenko; I. Boyko; R. A. Briere; V. Bytev; X. Cai; O. Cakir; A. Calcaterra; G. F. Cao; S. A. Cetin; J. F. Chang; G. Chelkov; G. Chen; H. S. Chen; J. C. Chen; M. L. Chen; S. J. Chen; X. Chen; Y. B. Chen; H. P. Cheng; Y. P. Chu; D. Cronin-Hennessy; H. L. Dai; J. P. Dai; D. Dedovich; Z. Y. Deng; A. Denig; I. Denysenko; M. Destefanis; W. M. Ding; Y. Ding; L. Y. Dong; M. Y. Dong; S. X. Du; J. Fang; S. S. Fang; H. Muramatsu; R. Poling; BESIII Collaboration

doi:10.1103/PhysRevD.87.032003

Evidence for η_c→γγ and measurement of J/ψ→3γ

M. Ablikim, M. N. Achasov, D. J. Ambrose, F. F. An, Q. An, Z. H. An, J. Z. Bai, Y. Ban, J. Becker, J. V. Bennett, M. Bertani, J. M. Bian, E. Boger, O. Bondarenko, I. Boyko, R. A. Briere, V. Bytev, X. Cai, O. Cakir, A. CalcaterraG. F. Cao, S. A. Cetin, J. F. Chang, G. Chelkov, G. Chen, H. S. Chen, J. C. Chen, M. L. Chen, S. J. Chen, X. Chen, Y. B. Chen, H. P. Cheng, Y. P. Chu, D. Cronin-Hennessy, H. L. Dai, J. P. Dai, D. Dedovich, Z. Y. Deng, A. Denig, I. Denysenko, M. Destefanis, W. M. Ding, Y. Ding, L. Y. Dong, M. Y. Dong, S. X. Du, J. Fang, S. S. Fang, H. Muramatsu, R. Poling, BESIII Collaboration

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

The decay of J/ψ to three photons is studied using ψ(3686) →π⁺π^-J/ψ in a sample of 1.0641×108 ψ(3686) events collected with the BESIII detector. Evidence of the direct decay of η_c to two photons, η_c→γγ , is reported, and the product branching fraction is determined to be B(J/ψ→γη_c,η_c→γγ)= (4.5±1.2±0.6)×10^-6, where the first error is statistical and the second is systematic. The branching fraction for J/ψ→3γ is measured to be (11.3±1.8±2.0) ×10^-6 with improved precision.

Original language	English (US)
Article number	032003
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	87
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.87.032003
State	Published - Feb 8 2013

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© 2013 American Physical Society.

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10.1103/PhysRevD.87.032003

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Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ban, Y., Becker, J., Bennett, J. V., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Cakir, O., ... BESIII Collaboration (2013). Evidence for η_c→γγ and measurement of J/ψ→3γ. Physical Review D - Particles, Fields, Gravitation and Cosmology, 87(3), Article 032003. https://doi.org/10.1103/PhysRevD.87.032003

Ablikim, M, Achasov, MN, Ambrose, DJ, An, FF, An, Q, An, ZH, Bai, JZ, Ban, Y, Becker, J, Bennett, JV, Bertani, M, Bian, JM, Boger, E, Bondarenko, O, Boyko, I, Briere, RA, Bytev, V, Cai, X, Cakir, O, Calcaterra, A, Cao, GF, Cetin, SA, Chang, JF, Chelkov, G, Chen, G, Chen, HS, Chen, JC, Chen, ML, Chen, SJ, Chen, X, Chen, YB, Cheng, HP, Chu, YP, Cronin-Hennessy, D, Dai, HL, Dai, JP, Dedovich, D, Deng, ZY, Denig, A, Denysenko, I, Destefanis, M, Ding, WM, Ding, Y, Dong, LY, Dong, MY, Du, SX, Fang, J, Fang, SS, Muramatsu, H, Poling, R & BESIII Collaboration 2013, 'Evidence for η_c→γγ and measurement of J/ψ→3γ', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 87, no. 3, 032003. https://doi.org/10.1103/PhysRevD.87.032003

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title = "Evidence for ηc→γγ and measurement of J/ψ→3γ",

abstract = "The decay of J/ψ to three photons is studied using ψ(3686) →π+π-J/ψ in a sample of 1.0641×108 ψ(3686) events collected with the BESIII detector. Evidence of the direct decay of ηc to two photons, ηc→γγ , is reported, and the product branching fraction is determined to be B(J/ψ→γηc,ηc→γγ)= (4.5±1.2±0.6)×10-6, where the first error is statistical and the second is systematic. The branching fraction for J/ψ→3γ is measured to be (11.3±1.8±2.0) ×10-6 with improved precision.",

author = "M. Ablikim and Achasov, {M. N.} and Ambrose, {D. J.} and An, {F. F.} and Q. An and An, {Z. H.} and Bai, {J. Z.} and Y. Ban and J. Becker and Bennett, {J. V.} and M. Bertani and Bian, {J. M.} and E. Boger and O. Bondarenko and I. Boyko and Briere, {R. A.} and V. Bytev and X. Cai and O. Cakir and A. Calcaterra and Cao, {G. F.} and Cetin, {S. A.} and Chang, {J. F.} and G. Chelkov and G. Chen and Chen, {H. S.} and Chen, {J. C.} and Chen, {M. L.} and Chen, {S. J.} and X. Chen and Chen, {Y. B.} and Cheng, {H. P.} and Chu, {Y. P.} and D. Cronin-Hennessy and Dai, {H. L.} and Dai, {J. P.} and D. Dedovich and Deng, {Z. Y.} and A. Denig and I. Denysenko and M. Destefanis and Ding, {W. M.} and Y. Ding and Dong, {L. Y.} and Dong, {M. Y.} and Du, {S. X.} and J. Fang and Fang, {S. S.} and H. Muramatsu and R. Poling and {BESIII Collaboration}",

note = "Publisher Copyright: {\textcopyright} 2013 American Physical Society.",

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doi = "10.1103/PhysRevD.87.032003",

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T1 - Evidence for ηc→γγ and measurement of J/ψ→3γ

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Ambrose, D. J.

AU - An, F. F.

AU - An, Q.

AU - An, Z. H.

AU - Bai, J. Z.

AU - Ban, Y.

AU - Becker, J.

AU - Bennett, J. V.

AU - Bertani, M.

AU - Bian, J. M.

AU - Boger, E.

AU - Bondarenko, O.

AU - Boyko, I.

AU - Briere, R. A.

AU - Bytev, V.

AU - Cai, X.

AU - Cakir, O.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cetin, S. A.

AU - Chang, J. F.

AU - Chelkov, G.

AU - Chen, G.

AU - Chen, H. S.

AU - Chen, J. C.

AU - Chen, M. L.

AU - Chen, S. J.

AU - Chen, X.

AU - Chen, Y. B.

AU - Cheng, H. P.

AU - Chu, Y. P.

AU - Cronin-Hennessy, D.

AU - Dai, H. L.

AU - Dai, J. P.

AU - Dedovich, D.

AU - Deng, Z. Y.

AU - Denig, A.

AU - Denysenko, I.

AU - Destefanis, M.

AU - Ding, W. M.

AU - Ding, Y.

AU - Dong, L. Y.

AU - Dong, M. Y.

AU - Du, S. X.

AU - Fang, J.

AU - Fang, S. S.

AU - Muramatsu, H.

AU - Poling, R.

AU - BESIII Collaboration

PY - 2013/2/8

Y1 - 2013/2/8

N2 - The decay of J/ψ to three photons is studied using ψ(3686) →π+π-J/ψ in a sample of 1.0641×108 ψ(3686) events collected with the BESIII detector. Evidence of the direct decay of ηc to two photons, ηc→γγ , is reported, and the product branching fraction is determined to be B(J/ψ→γηc,ηc→γγ)= (4.5±1.2±0.6)×10-6, where the first error is statistical and the second is systematic. The branching fraction for J/ψ→3γ is measured to be (11.3±1.8±2.0) ×10-6 with improved precision.

AB - The decay of J/ψ to three photons is studied using ψ(3686) →π+π-J/ψ in a sample of 1.0641×108 ψ(3686) events collected with the BESIII detector. Evidence of the direct decay of ηc to two photons, ηc→γγ , is reported, and the product branching fraction is determined to be B(J/ψ→γηc,ηc→γγ)= (4.5±1.2±0.6)×10-6, where the first error is statistical and the second is systematic. The branching fraction for J/ψ→3γ is measured to be (11.3±1.8±2.0) ×10-6 with improved precision.

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DO - 10.1103/PhysRevD.87.032003

M3 - Article

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SN - 1550-7998

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JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 3

M1 - 032003

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