TY - JOUR
T1 - Precision Measurement of the Decay ς+ →pγ in the Process J/ψ → ς+ ς ¯ -
AU - Ablikim, M.
AU - Achasov, M. N.
AU - Adlarson, P.
AU - Aliberti, R.
AU - Kabana, S.
AU - The BESIII collaboration
N1 - Publisher Copyright:
© 2023 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 - 2023/5/26
Y1 - 2023/5/26
N2 - Using (10 087±44)×106 J/ψ events collected with the BESIII detector, the radiative hyperon decay ς+→pγ is studied at an electron-positron collider experiment for the first time. The absolute branching fraction is measured to be (0.996±0.021stat±0.018syst)×10-3, which is lower than its world average value by 4.2 standard deviations. Its decay asymmetry parameter is determined to be -0.652±0.056stat±0.020syst. The branching fraction and decay asymmetry parameter are the most precise to date, and the accuracies are improved by 78% and 34%, respectively.
AB - Using (10 087±44)×106 J/ψ events collected with the BESIII detector, the radiative hyperon decay ς+→pγ is studied at an electron-positron collider experiment for the first time. The absolute branching fraction is measured to be (0.996±0.021stat±0.018syst)×10-3, which is lower than its world average value by 4.2 standard deviations. Its decay asymmetry parameter is determined to be -0.652±0.056stat±0.020syst. The branching fraction and decay asymmetry parameter are the most precise to date, and the accuracies are improved by 78% and 34%, respectively.
UR - https://www.scopus.com/pages/publications/85161644119
U2 - 10.1103/PhysRevLett.130.211901
DO - 10.1103/PhysRevLett.130.211901
M3 - Article
C2 - 37295102
AN - SCOPUS:85161644119
SN - 0031-9007
VL - 130
JO - Physical Review Letters
JF - Physical Review Letters
IS - 21
M1 - 211901
ER -