Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Measurement of the Dynamics of the Decays Ds+ →η (′)e+νe. / Belle Collaboration.
в: Physical Review Letters, Том 122, № 12, 121801, 25.03.2019.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Measurement of the Dynamics of the Decays Ds+ →η (′)e+νe
AU - The BELLE collaboration
AU - Ablikim, M.
AU - Achasov, M. N.
AU - Ahmed, S.
AU - Albrecht, M.
AU - Alekseev, M.
AU - Amoroso, A.
AU - An, F. F.
AU - An, Q.
AU - Bai, J. Z.
AU - Bai, Y.
AU - Bakina, O.
AU - Baldini Ferroli, R.
AU - Ban, Y.
AU - Begzsuren, K.
AU - Bennett, D. W.
AU - Bennett, J. V.
AU - Berger, N.
AU - Bertani, M.
AU - Bettoni, D.
AU - Bianchi, F.
AU - Boger, E.
AU - Boyko, I.
AU - Briere, R. A.
AU - Cai, H.
AU - Cai, X.
AU - Calcaterra, A.
AU - Cao, G. F.
AU - Cetin, S. A.
AU - Chai, J.
AU - Chang, J. F.
AU - Chelkov, G.
AU - Chen, G.
AU - Chen, H. S.
AU - Chen, J. C.
AU - Chen, M. L.
AU - Chen, P. L.
AU - Chen, S. J.
AU - Chen, X. R.
AU - Chen, Y. B.
AU - Cheng, W.
AU - Chu, X. K.
AU - Cibinetto, G.
AU - Cossio, F.
AU - Dai, H. L.
AU - Dai, J. P.
AU - Dbeyssi, A.
AU - Dedovich, D.
AU - Deng, Z. Y.
AU - Muchnoi, N. Yu
AU - Nikolaev, I. B.
N1 - Publisher Copyright: © 2019 authors. Published by the American Physical Society.
PY - 2019/3/25
Y1 - 2019/3/25
N2 - Using e+e- annihilation data corresponding to an integrated luminosity of 3.19 fb-1 collected at a center-of-mass energy of 4.178 GeV with the BESIII detector, we measure the absolute branching fractions BDs+→ηe+νe=(2.323±0.063stat±0.063syst)% and BDs+→η′e+νe=(0.824±0.073stat±0.027syst)% via a tagged analysis technique, where one Ds is fully reconstructed in a hadronic mode. Combining these measurements with previous BESIII measurements of BD+→η(′)e+νe, the η-η′ mixing angle in the quark flavor basis is determined to be φP=(40.1±2.1stat±0.7syst)°. From the first measurements of the dynamics of Ds+→η(′)e+νe decays, the products of the hadronic form factors f+η(′)(0) and the Cabibbo-Kobayashi-Maskawa matrix element |Vcs| are determined with different form factor parametrizations. For the two-parameter series expansion, the results are f+η(0)|Vcs|=0.4455±0.0053stat±0.0044syst and f+η′(0)|Vcs|=0.477±0.049stat±0.011syst.
AB - Using e+e- annihilation data corresponding to an integrated luminosity of 3.19 fb-1 collected at a center-of-mass energy of 4.178 GeV with the BESIII detector, we measure the absolute branching fractions BDs+→ηe+νe=(2.323±0.063stat±0.063syst)% and BDs+→η′e+νe=(0.824±0.073stat±0.027syst)% via a tagged analysis technique, where one Ds is fully reconstructed in a hadronic mode. Combining these measurements with previous BESIII measurements of BD+→η(′)e+νe, the η-η′ mixing angle in the quark flavor basis is determined to be φP=(40.1±2.1stat±0.7syst)°. From the first measurements of the dynamics of Ds+→η(′)e+νe decays, the products of the hadronic form factors f+η(′)(0) and the Cabibbo-Kobayashi-Maskawa matrix element |Vcs| are determined with different form factor parametrizations. For the two-parameter series expansion, the results are f+η(0)|Vcs|=0.4455±0.0053stat±0.0044syst and f+η′(0)|Vcs|=0.477±0.049stat±0.011syst.
UR - http://www.scopus.com/inward/record.url?scp=85064058447&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.122.121801
DO - 10.1103/PhysRevLett.122.121801
M3 - Article
C2 - 30978074
AN - SCOPUS:85064058447
VL - 122
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 12
M1 - 121801
ER -
ID: 19344154