Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Measurement of the branching fraction of Ds+→ℓ+νℓ via e+e−→Ds*+Ds*−. / The BESIII Collaboration ; Николаев, Иван Борисович; Мучной, Николай Юрьевич.
в: Physical Review D, Том 110, № 5, 052002, 10.09.2024.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Measurement of the branching fraction of Ds+→ℓ+νℓ via e+e−→Ds*+Ds*−
AU - BESIII Collaboration
AU - Ablikim, M.
AU - Achasov, M. n.
AU - Adlarson, P.
AU - Afedulidis, O.
AU - Ai, X. c.
AU - Aliberti, R.
AU - Amoroso, A.
AU - An, Q.
AU - Bai, Y.
AU - Bakina, O.
AU - Balossino, I.
AU - Ban, Y.
AU - Bao, H.-R.
AU - Batozskaya, V.
AU - Begzsuren, K.
AU - Berger, N.
AU - Berlowski, M.
AU - Bertani, M.
AU - Bettoni, D.
AU - Bianchi, F.
AU - Bianco, E.
AU - Bortone, A.
AU - Briere, R. a.
AU - Brueggemann, A.
AU - Николаев, Иван Борисович
AU - Мучной, Николай Юрьевич
PY - 2024/9/10
Y1 - 2024/9/10
N2 - Based on 10.64 fb-1 of e+e- collision data taken at center-of-mass energies between 4.237 and 4.699 GeV with the BESIII detector, we study the leptonic Ds+ decays using the e+e-→Ds∗+Ds∗- process. The branching fractions of Ds+→ℓ+νℓ(ℓ=μ,τ) are measured to be BDs+→μ+νμ=(0.547±0.026stat±0.016syst)% and BDs+→τ+ντ=(5.60±0.16stat±0.20syst)%, respectively. The product of the decay constant and Cabibbo-Kobayashi-Maskawa matrix element |Vcs| is determined to be fDs+|Vcs|=(246.5±5.9stat±3.6syst±0.5input)μν and fDs+|Vcs|=(252.7±3.6stat±4.5syst±0.6input)τν MeV, respectively. Taking the value of |Vcs| from a global fit in the Standard Model, we obtain fDs+=(253.2±6.0stat±3.7syst±0.6input)μν and fDs+=(259.6±3.7stat±4.6syst±0.6input)τν MeV, respectively. Conversely, taking the value for fDs+ from the latest lattice quantum chromodynamics calculation, we obtain |Vcs|=(0.986±0.023stat±0.014syst±0.003input)μν and |Vcs|=(1.011±0.014stat±0.018syst±0.003input)τν, respectively.
AB - Based on 10.64 fb-1 of e+e- collision data taken at center-of-mass energies between 4.237 and 4.699 GeV with the BESIII detector, we study the leptonic Ds+ decays using the e+e-→Ds∗+Ds∗- process. The branching fractions of Ds+→ℓ+νℓ(ℓ=μ,τ) are measured to be BDs+→μ+νμ=(0.547±0.026stat±0.016syst)% and BDs+→τ+ντ=(5.60±0.16stat±0.20syst)%, respectively. The product of the decay constant and Cabibbo-Kobayashi-Maskawa matrix element |Vcs| is determined to be fDs+|Vcs|=(246.5±5.9stat±3.6syst±0.5input)μν and fDs+|Vcs|=(252.7±3.6stat±4.5syst±0.6input)τν MeV, respectively. Taking the value of |Vcs| from a global fit in the Standard Model, we obtain fDs+=(253.2±6.0stat±3.7syst±0.6input)μν and fDs+=(259.6±3.7stat±4.6syst±0.6input)τν MeV, respectively. Conversely, taking the value for fDs+ from the latest lattice quantum chromodynamics calculation, we obtain |Vcs|=(0.986±0.023stat±0.014syst±0.003input)μν and |Vcs|=(1.011±0.014stat±0.018syst±0.003input)τν, respectively.
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85205122591&origin=inward&txGid=7c76332bcfc234626311a35e76b04883
U2 - 10.1103/PhysRevD.110.052002
DO - 10.1103/PhysRevD.110.052002
M3 - Article
VL - 110
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 5
M1 - 052002
ER -
ID: 62705195