TY - JOUR
T1 - Updated measurements of the M1 transition ψ (3686) →γηc (2S) with ηc (2S) →k K ¯ π
AU - Ablikim, M.
AU - Achasov, M. N.
AU - Adlarson, P.
AU - Ai, X. C.
AU - Kabana, S.
AU - The BESIII collaboration
N1 - Publisher Copyright:
© 2024 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 SCOAP3.
PY - 2024/2/1
Y1 - 2024/2/1
N2 - Based on a data sample of (2712.4±14.3)×106ψ(3686) events collected with the BESIII detector at the BEPCII collider, the M1 transition ψ(3686)→γηc(2S) with ηc(2S)→KK̄π is studied, where KK̄π is K+K-π0 or KS0K±π∓. The mass and width of the ηc(2S) are measured to be (3637.8±0.8(stat)±0.2(syst)) MeV/c2 and (10.5±1.7(stat)±3.5(syst)) MeV, respectively. The product branching fraction B(ψ(3686)→γηc(2S))×B(ηc(2S)→KK̄π) is determined to be (0.97±0.06(stat)±0.09(syst))×10-5. Using B(ηc(2S)→KK̄π)=(1.86-0.49+0.68)%, we obtain the branching fraction of the radiative transition to be B(ψ(3686)→γηc(2S))=(5.2±0.3(stat)±0.5(syst)-1.4+1.9(extr))×10-4, where the third uncertainty is due to the quoted B(ηc(2S)→KK̄π).
AB - Based on a data sample of (2712.4±14.3)×106ψ(3686) events collected with the BESIII detector at the BEPCII collider, the M1 transition ψ(3686)→γηc(2S) with ηc(2S)→KK̄π is studied, where KK̄π is K+K-π0 or KS0K±π∓. The mass and width of the ηc(2S) are measured to be (3637.8±0.8(stat)±0.2(syst)) MeV/c2 and (10.5±1.7(stat)±3.5(syst)) MeV, respectively. The product branching fraction B(ψ(3686)→γηc(2S))×B(ηc(2S)→KK̄π) is determined to be (0.97±0.06(stat)±0.09(syst))×10-5. Using B(ηc(2S)→KK̄π)=(1.86-0.49+0.68)%, we obtain the branching fraction of the radiative transition to be B(ψ(3686)→γηc(2S))=(5.2±0.3(stat)±0.5(syst)-1.4+1.9(extr))×10-4, where the third uncertainty is due to the quoted B(ηc(2S)→KK̄π).
UR - https://www.scopus.com/pages/publications/85185285509
U2 - 10.1103/PhysRevD.109.032004
DO - 10.1103/PhysRevD.109.032004
M3 - Article
AN - SCOPUS:85185285509
SN - 2470-0010
VL - 109
JO - Physical Review D
JF - Physical Review D
IS - 3
M1 - 032004
ER -