TY - JOUR
T1 - Improved measurement of the semileptonic decay Ds+ →k0e+νe
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 - 2024/9/1
Y1 - 2024/9/1
N2 - Analyzing e+e- collision data corresponding to an integrated luminosity of 7.33 fb-1 collected at center-of-mass energies between 4.128 and 4.226 GeV with the BESIII detector, we measure the branching fraction of the semileptonic decay Ds+→K0e+νe to be (2.98±0.23stat±0.12syst)×10-3. Based on fit to the partial decay rates in various q2 intervals, the product value of Ds+→K0 hadronic form factor and Cabibbo-Kobayashi-Maskawa element is measured to be f+K0(0)|Vcd|=0.143±0.011stat±0.003syst. With |Vcd|=0.22486±0.00067 as an input, the hadronic form factor is evaluated to be f+K0(0)=0.636±0.049stat±0.013syst. The branching fraction and form factor measurements are factors of 1.6 and 1.7 more precise than the previous world averages, respectively.
AB - Analyzing e+e- collision data corresponding to an integrated luminosity of 7.33 fb-1 collected at center-of-mass energies between 4.128 and 4.226 GeV with the BESIII detector, we measure the branching fraction of the semileptonic decay Ds+→K0e+νe to be (2.98±0.23stat±0.12syst)×10-3. Based on fit to the partial decay rates in various q2 intervals, the product value of Ds+→K0 hadronic form factor and Cabibbo-Kobayashi-Maskawa element is measured to be f+K0(0)|Vcd|=0.143±0.011stat±0.003syst. With |Vcd|=0.22486±0.00067 as an input, the hadronic form factor is evaluated to be f+K0(0)=0.636±0.049stat±0.013syst. The branching fraction and form factor measurements are factors of 1.6 and 1.7 more precise than the previous world averages, respectively.
UR - https://www.scopus.com/pages/publications/85206307386
U2 - 10.1103/PhysRevD.110.052012
DO - 10.1103/PhysRevD.110.052012
M3 - Article
AN - SCOPUS:85206307386
SN - 2470-0010
VL - 110
JO - Physical Review D
JF - Physical Review D
IS - 5
M1 - 052012
ER -