Updated measurement of the branching fraction of Ds+→τ+ντ via τ+→π+ν¯τ

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Updated measurement of the branching fraction of Ds+→τ+ντ via τ+→π+ν¯τ. / The BESIII Collaboration ; Мучной, Николай Юрьевич ; Николаев, Иван Борисович.

в: Physical Review D, Том 108, № 9, 092014, 30.11.2023.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

BibTeX

@article{64c36f13829543918015eb7a07afabe4,

title = "Updated measurement of the branching fraction of Ds+→τ+ντ via τ+→π+ν¯τ",

abstract = "This paper reports the study of Ds+→τ+ν via τ+→π+ν¯τ using a boosted decision tree method, with 7.33 fb-1 of e+e- collision data collected by the BESIII detector at center-of-mass energies between 4.128 and 4.226 GeV. The branching fraction of Ds+→τ+ντ is determined to be (5.44±0.17stat±0.13syst)%. The product of the Ds+ decay constant fDs+ and the Cabibbo-Kobayashi-Maskawa matrix element |Vcs| is fDs+|Vcs|=(248.3±3.9stat±3.1syst±1.0input) MeV. Combining with the |Vcs| value obtained from the Standard Model global fit or the fDs+ from the lattice quantum chromodynamics, we determine |Vcs|=0.993±0.015stat±0.012syst±0.004input and fDs+=(255.0±4.0stat±3.2syst±1.0input) MeV. The first uncertainty is statistical, the second one is systematic and the third one is due to the input parameters, mainly the lifetime of Ds+. All results obtained in this work supersede the BESIII previous results based on 6.32 fb-1 of e+e- collision data taken at center-of-mass energies between 4.178 and 4.226 GeV.",

author = "{BESIII Collaboration} and M. Ablikim and M. n. Achasov and Мучной, {Николай Юрьевич} and Николаев, {Иван Борисович}",

note = "Updated measurement of the branching fraction of Ds+→τ+ντ via τ+→π+ν¯τ / BESIII Collaboration // Physical Review D. – 2023. – Vol. 108, No. 9. – P. 092014. – DOI 10.1103/physrevd.108.092014. ",

year = "2023",

month = nov,

day = "30",

doi = "10.1103/PhysRevD.108.092014",

language = "English",

volume = "108",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "9",

}

RIS

TY - JOUR

T1 - Updated measurement of the branching fraction of Ds+→τ+ντ via τ+→π+ν¯τ

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. n.

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

N1 - Updated measurement of the branching fraction of Ds+→τ+ντ via τ+→π+ν¯τ / BESIII Collaboration // Physical Review D. – 2023. – Vol. 108, No. 9. – P. 092014. – DOI 10.1103/physrevd.108.092014.

PY - 2023/11/30

Y1 - 2023/11/30

N2 - This paper reports the study of Ds+→τ+ν via τ+→π+ν¯τ using a boosted decision tree method, with 7.33 fb-1 of e+e- collision data collected by the BESIII detector at center-of-mass energies between 4.128 and 4.226 GeV. The branching fraction of Ds+→τ+ντ is determined to be (5.44±0.17stat±0.13syst)%. The product of the Ds+ decay constant fDs+ and the Cabibbo-Kobayashi-Maskawa matrix element |Vcs| is fDs+|Vcs|=(248.3±3.9stat±3.1syst±1.0input) MeV. Combining with the |Vcs| value obtained from the Standard Model global fit or the fDs+ from the lattice quantum chromodynamics, we determine |Vcs|=0.993±0.015stat±0.012syst±0.004input and fDs+=(255.0±4.0stat±3.2syst±1.0input) MeV. The first uncertainty is statistical, the second one is systematic and the third one is due to the input parameters, mainly the lifetime of Ds+. All results obtained in this work supersede the BESIII previous results based on 6.32 fb-1 of e+e- collision data taken at center-of-mass energies between 4.178 and 4.226 GeV.

AB - This paper reports the study of Ds+→τ+ν via τ+→π+ν¯τ using a boosted decision tree method, with 7.33 fb-1 of e+e- collision data collected by the BESIII detector at center-of-mass energies between 4.128 and 4.226 GeV. The branching fraction of Ds+→τ+ντ is determined to be (5.44±0.17stat±0.13syst)%. The product of the Ds+ decay constant fDs+ and the Cabibbo-Kobayashi-Maskawa matrix element |Vcs| is fDs+|Vcs|=(248.3±3.9stat±3.1syst±1.0input) MeV. Combining with the |Vcs| value obtained from the Standard Model global fit or the fDs+ from the lattice quantum chromodynamics, we determine |Vcs|=0.993±0.015stat±0.012syst±0.004input and fDs+=(255.0±4.0stat±3.2syst±1.0input) MeV. The first uncertainty is statistical, the second one is systematic and the third one is due to the input parameters, mainly the lifetime of Ds+. All results obtained in this work supersede the BESIII previous results based on 6.32 fb-1 of e+e- collision data taken at center-of-mass energies between 4.178 and 4.226 GeV.

UR - https://www.elibrary.ru/item.asp?id=64093422

UR - https://www.mendeley.com/catalogue/8a13bac2-60d3-3ae8-841d-b3218af0aed1/

U2 - 10.1103/PhysRevD.108.092014

DO - 10.1103/PhysRevD.108.092014

M3 - Article

VL - 108

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 9

M1 - 092014

ER -

ID: 68350541