TY - JOUR
T1 - Precise measurements of [Presented Formula] and [Presented Formula] decays
AU - Ablikim, M.
AU - Achasov, M. N.
AU - Adlarson, P.
AU - Ai, X. C.
AU - Kabana, S.
AU - The BESIII collaboration
N1 - Publisher Copyright:
Published by the American Physical Society under the terms of the 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.
PY - 2026
Y1 - 2026
N2 - Using e+ e- collision data corresponding to an integrated luminosity of 20.3 fb-1, collected at the centerof-mass energy of 3.773 GeV with the BESIII detector, we present precise measurements of [Presented Formula] and [Presented Formula] decays. The branching fractions of [Presented Formula], and D [Presented Formula] are measured to be [Presented Formula], and [Presented Formula], respectively. The partial decay rates of these four decays are measured with improved precision, and their forward-backward asymmetries are determined for the first time. By performing a simultaneous fit to the measured partial decay rates and the forward-backward asymmetries of [Presented Formula], a search for a possible scalar current contribution in the [Presented Formula] transition is performed. The results are [Presented Formula] and [Presented Formula], corresponding to a difference from the Standard Model (SM) with a significance of 2.3σ. The product of the form factor f+(0) and the modulus of the c → s Cabibbo-Kobayashi-Maskawa matrix element |Vcs| is determined to be [Presented Formula]. With the inputs [Presented Formula] from the SM global fit or [Presented Formula] from the lattice quantum chromodynamics calculation, we derive [Presented Formula] and [Presented Formula]. Combining with the results of the semimuonic and semielectronic decays, lepton flavor universality is tested via the ratios of the decay rates between semimuonic and semielectronic decays in the full and different momentum transfer ranges.
AB - Using e+ e- collision data corresponding to an integrated luminosity of 20.3 fb-1, collected at the centerof-mass energy of 3.773 GeV with the BESIII detector, we present precise measurements of [Presented Formula] and [Presented Formula] decays. The branching fractions of [Presented Formula], and D [Presented Formula] are measured to be [Presented Formula], and [Presented Formula], respectively. The partial decay rates of these four decays are measured with improved precision, and their forward-backward asymmetries are determined for the first time. By performing a simultaneous fit to the measured partial decay rates and the forward-backward asymmetries of [Presented Formula], a search for a possible scalar current contribution in the [Presented Formula] transition is performed. The results are [Presented Formula] and [Presented Formula], corresponding to a difference from the Standard Model (SM) with a significance of 2.3σ. The product of the form factor f+(0) and the modulus of the c → s Cabibbo-Kobayashi-Maskawa matrix element |Vcs| is determined to be [Presented Formula]. With the inputs [Presented Formula] from the SM global fit or [Presented Formula] from the lattice quantum chromodynamics calculation, we derive [Presented Formula] and [Presented Formula]. Combining with the results of the semimuonic and semielectronic decays, lepton flavor universality is tested via the ratios of the decay rates between semimuonic and semielectronic decays in the full and different momentum transfer ranges.
UR - https://www.scopus.com/pages/publications/105051750904
U2 - 10.1103/3FNF-X8K8
DO - 10.1103/3FNF-X8K8
M3 - Article
AN - SCOPUS:105051750904
SN - 2470-0010
VL - 114
JO - Physical Review D
JF - Physical Review D
IS - 3
M1 - 033008
ER -