TY - JOUR
T1 - Search for ηc (2S) →2 (π+π-) and improved measurement of χcJ →2 (π+π-)
AU - Ablikim, M.
AU - Achasov, M. N.
AU - Adlarson, P.
AU - Afedulidis, O.
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 - 2024/10/1
Y1 - 2024/10/1
N2 - We search for the hadronic decay ηc(2S)→2(π+π-) in the ψ(3686)→γηc(2S) radiative decay using (27.12±0.14)×108 ψ(3686) events collected by the BESIII detector at the BEPCII collider. No significant signal is found, and the upper limit of B[ψ(3686)→γηc(2S)]B[ηc(2S)→2(π+π-)] is determined to be 1.43×10-6 at the 90% confidence level. Using ψ(3686)→γχcJ transitions, we also measure the branching fractions of B[χcJ(J=0,1,2)→2(π+π-)], which are B[χc0→2(π+π-)]=(2.127±0.002(stat)±0.101(syst))%, B[χc1→2(π+π-)]=(0.685±0.001(stat)±0.031(syst))%, and B[χc2→2(π+π-)]=(1.153±0.001(stat)±0.063(syst))%.
AB - We search for the hadronic decay ηc(2S)→2(π+π-) in the ψ(3686)→γηc(2S) radiative decay using (27.12±0.14)×108 ψ(3686) events collected by the BESIII detector at the BEPCII collider. No significant signal is found, and the upper limit of B[ψ(3686)→γηc(2S)]B[ηc(2S)→2(π+π-)] is determined to be 1.43×10-6 at the 90% confidence level. Using ψ(3686)→γχcJ transitions, we also measure the branching fractions of B[χcJ(J=0,1,2)→2(π+π-)], which are B[χc0→2(π+π-)]=(2.127±0.002(stat)±0.101(syst))%, B[χc1→2(π+π-)]=(0.685±0.001(stat)±0.031(syst))%, and B[χc2→2(π+π-)]=(1.153±0.001(stat)±0.063(syst))%.
UR - https://www.scopus.com/pages/publications/85207123305
U2 - 10.1103/PhysRevD.110.072009
DO - 10.1103/PhysRevD.110.072009
M3 - Article
AN - SCOPUS:85207123305
SN - 2470-0010
VL - 110
JO - Physical Review D
JF - Physical Review D
IS - 7
M1 - 072009
ER -