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First Experimental Study of the Purely Leptonic Decay Ds*+→e+νe. / The BESIII Collaboration ; Николаев, Иван Борисович; Мучной, Николай Юрьевич.
в: Physical Review Letters, Том 131, № 14, 141802, 06.10.2023.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - First Experimental Study of the Purely Leptonic Decay Ds*+→e+νe
AU - BESIII Collaboration
AU - Ablikim, M.
AU - Achasov, M. n.
AU - Николаев, Иван Борисович
AU - Мучной, Николай Юрьевич
N1 - First Experimental Study of the Purely Leptonic Decay Ds*+→e+νe / BESIII Collaboration// Physical Review Letters. – 2023. – Vol. 131, No. 14. – P. 141802. – DOI 10.1103/physrevlett.131.141802.
PY - 2023/10/6
Y1 - 2023/10/6
N2 - Using 7.33 fb-1 of e+e- collision data taken with the BESIII detector at the BEPCII collider, we report the first experimental study of the purely leptonic decay Ds∗+→e+νe. Our data contain a signal of this decay with a statistical significance of 2.9σ. The branching fraction of Ds∗+→e+νe is measured to be (2.1-0.9stat+1.2±0.2syst)×10-5, corresponding to an upper limit of 4.0×10-5 at the 90% confidence level. Taking the total width of the Ds∗+ [(0.070±0.028) keV] predicted with the radiative Ds∗+ decay from the lattice QCD calculation as input, the decay constant of the Ds∗+ is determined to be fDs∗+=(214-46stat+61±44syst) MeV, corresponding to an upper limit of 354 MeV at the 90% confidence level.
AB - Using 7.33 fb-1 of e+e- collision data taken with the BESIII detector at the BEPCII collider, we report the first experimental study of the purely leptonic decay Ds∗+→e+νe. Our data contain a signal of this decay with a statistical significance of 2.9σ. The branching fraction of Ds∗+→e+νe is measured to be (2.1-0.9stat+1.2±0.2syst)×10-5, corresponding to an upper limit of 4.0×10-5 at the 90% confidence level. Taking the total width of the Ds∗+ [(0.070±0.028) keV] predicted with the radiative Ds∗+ decay from the lattice QCD calculation as input, the decay constant of the Ds∗+ is determined to be fDs∗+=(214-46stat+61±44syst) MeV, corresponding to an upper limit of 354 MeV at the 90% confidence level.
UR - https://www.elibrary.ru/item.asp?id=63164803
UR - https://www.mendeley.com/catalogue/51af9d0d-9f07-3998-a7f6-6dff30fa5afb/
U2 - 10.1103/PhysRevLett.131.141802
DO - 10.1103/PhysRevLett.131.141802
M3 - Article
C2 - 37862669
VL - 131
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 14
M1 - 141802
ER -
ID: 68350100