Precision Study of η′ →γπ+π- Decay Dynamics

(BESIII Collaboration)

doi:10.1103/PhysRevLett.120.242003

Precision Study of η′ →γπ+π- Decay Dynamics

(BESIII Collaboration)

Physics and Astronomy (Twin Cities)

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

39 Scopus citations

Abstract

Using a low background data sample of 9.7×105 J/ψ→γη′, η′→γπ+π- events, which are 2 orders of magnitude larger than those from the previous experiments, recorded with the BESIII detector at BEPCII, the decay dynamics of η′→γπ+π- are studied with both model-dependent and model-independent approaches. The contributions of ω and the ρ(770)-ω interference are observed for the first time in the decays η′→γπ+π- in both approaches. Additionally, a contribution from the box anomaly or the ρ(1450) resonance is required in the model-dependent approach, while the process specific part of the decay amplitude is determined in the model-independent approach.

Original language	English (US)
Article number	242003
Journal	Physical review letters
Volume	120
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevLett.120.242003
State	Published - Jun 14 2018

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© 2018 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP.

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@article{a7f2e2ec70654bd18c5707960ea4c7c8,

title = "Precision Study of η′ →γπ+π- Decay Dynamics",

abstract = "Using a low background data sample of 9.7×105 J/ψ→γη′, η′→γπ+π- events, which are 2 orders of magnitude larger than those from the previous experiments, recorded with the BESIII detector at BEPCII, the decay dynamics of η′→γπ+π- are studied with both model-dependent and model-independent approaches. The contributions of ω and the ρ(770)-ω interference are observed for the first time in the decays η′→γπ+π- in both approaches. Additionally, a contribution from the box anomaly or the ρ(1450) resonance is required in the model-dependent approach, while the process specific part of the decay amplitude is determined in the model-independent approach.",

author = "{(BESIII Collaboration)} and M. Ablikim and Achasov, {M. N.} and S. Ahmed and Ai, {X. C.} and O. Albayrak and M. Albrecht and Ambrose, {D. J.} and A. Amoroso and An, {F. F.} and Q. An and Bai, {J. Z.} and Ferroli, {R. Baldini} and Y. Ban and Bennett, {D. W.} and Bennett, {J. V.} and N. Berger and M. Bertani and D. Bettoni and Bian, {J. M.} and F. Bianchi and E. Boger and I. Boyko and Briere, {R. A.} and H. Cai and X. Cai and O. Cakir and A. Calcaterra and Cao, {G. F.} and Cetin, {S. A.} and J. Chai and Chang, {J. F.} and G. Chelkov and G. Chen and Chen, {H. S.} and Chen, {J. C.} and Chen, {M. L.} and S. Chen and Chen, {S. J.} and X. Chen and Chen, {X. R.} and Chen, {Y. B.} and Cheng, {H. P.} and Chu, {X. K.} and G. Cibinetto and Dai, {H. L.} and Dai, {J. P.} and A. Dbeyssi and D. Dedovich and Deng, {Z. Y.} and A. Denig",

note = "Publisher Copyright: {\textcopyright} 2018 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP.",

year = "2018",

month = jun,

day = "14",

doi = "10.1103/PhysRevLett.120.242003",

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T1 - Precision Study of η′ →γπ+π- Decay Dynamics

AU - (BESIII Collaboration)

AU - Ablikim, M.

AU - Achasov, M. N.

AU - Ahmed, S.

AU - Ai, X. C.

AU - Albayrak, O.

AU - Albrecht, M.

AU - Ambrose, D. J.

AU - Amoroso, A.

AU - An, F. F.

AU - An, Q.

AU - Bai, J. Z.

AU - Ferroli, R. Baldini

AU - Ban, Y.

AU - Bennett, D. W.

AU - Bennett, J. V.

AU - Berger, N.

AU - Bertani, M.

AU - Bettoni, D.

AU - Bian, J. M.

AU - Bianchi, F.

AU - Boger, E.

AU - Boyko, I.

AU - Briere, R. A.

AU - Cai, H.

AU - Cai, X.

AU - Cakir, O.

AU - Calcaterra, A.

AU - Cao, G. F.

AU - Cetin, S. A.

AU - Chai, J.

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.

AU - Chen, S. J.

AU - Chen, X.

AU - Chen, X. R.

AU - Chen, Y. B.

AU - Cheng, H. P.

AU - Chu, X. K.

AU - Cibinetto, G.

AU - Dai, H. L.

AU - Dai, J. P.

AU - Dbeyssi, A.

AU - Dedovich, D.

AU - Deng, Z. Y.

AU - Denig, A.

N1 - Publisher Copyright: © 2018 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP.

PY - 2018/6/14

Y1 - 2018/6/14

N2 - Using a low background data sample of 9.7×105 J/ψ→γη′, η′→γπ+π- events, which are 2 orders of magnitude larger than those from the previous experiments, recorded with the BESIII detector at BEPCII, the decay dynamics of η′→γπ+π- are studied with both model-dependent and model-independent approaches. The contributions of ω and the ρ(770)-ω interference are observed for the first time in the decays η′→γπ+π- in both approaches. Additionally, a contribution from the box anomaly or the ρ(1450) resonance is required in the model-dependent approach, while the process specific part of the decay amplitude is determined in the model-independent approach.

AB - Using a low background data sample of 9.7×105 J/ψ→γη′, η′→γπ+π- events, which are 2 orders of magnitude larger than those from the previous experiments, recorded with the BESIII detector at BEPCII, the decay dynamics of η′→γπ+π- are studied with both model-dependent and model-independent approaches. The contributions of ω and the ρ(770)-ω interference are observed for the first time in the decays η′→γπ+π- in both approaches. Additionally, a contribution from the box anomaly or the ρ(1450) resonance is required in the model-dependent approach, while the process specific part of the decay amplitude is determined in the model-independent approach.

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U2 - 10.1103/PhysRevLett.120.242003

DO - 10.1103/PhysRevLett.120.242003

M3 - Article

C2 - 29956981

AN - SCOPUS:85048553311

SN - 0031-9007

VL - 120

JO - Physical review letters

JF - Physical review letters

IS - 24

M1 - 242003

ER -

Precision Study of η′ →γπ+π- Decay Dynamics

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