Research output: Contribution to journal › Article › peer-review
Precision Study of η′ →γπ+π- Decay Dynamics. / The BELLE collaboration.
In: Physical Review Letters, Vol. 120, No. 24, 242003, 14.06.2018.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Precision Study of η′ →γπ+π- Decay Dynamics
AU - The BELLE 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 - Muchnoi, N. Yu
AU - Nikolaev, I. B.
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.
KW - INITIAL-STATE RADIATION
KW - KLOE DETECTOR
KW - CROSS-SECTION
KW - FORM-FACTOR
KW - RHO-MESON
KW - COLLISIONS
KW - WIDTH
KW - PI(+)PI(-))
KW - ETA'(958)
KW - E(+)E(-)
UR - http://www.scopus.com/inward/record.url?scp=85048553311&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.120.242003
DO - 10.1103/PhysRevLett.120.242003
M3 - Article
C2 - 29956981
AN - SCOPUS:85048553311
VL - 120
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 24
M1 - 242003
ER -
ID: 14047112